/* ============================================
   Mohamed Elsayed - Portfolio Styles
   Professional Dark/Light Theme with RTL Support
   ============================================ */

/* ---- CSS Variables ---- */
:root {
    --font-main: 'Inter', sans-serif;
    --font-code: 'JetBrains Mono', monospace;
    --font-ar: 'Cairo', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --bg-nav: rgba(10, 10, 15, 0.85);

    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b4;
    --text-tertiary: #8585a0;

    --accent-primary: #6366f1;
    --accent-secondary: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.15);
    --accent-glow-strong: rgba(99, 102, 241, 0.3);

    --gradient-primary: linear-gradient(135deg, #6366f1, #a78bfa, #c084fc);
    --gradient-card: linear-gradient(145deg, rgba(22, 22, 31, 0.8), rgba(18, 18, 26, 0.9));
    --gradient-hero: radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
                     radial-gradient(ellipse at 80% 20%, rgba(167, 139, 250, 0.06) 0%, transparent 50%);

    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);

    --code-bg: #1a1a2e;
    --code-keyword: #c084fc;
    --code-string: #34d399;
    --code-type: #60a5fa;
    --code-prop: #f0f0f5;
    --code-var: #fbbf24;

    --skill-bar-bg: rgba(255, 255, 255, 0.06);
    --timeline-line: rgba(99, 102, 241, 0.2);

    --scrollbar-track: #12121a;
    --scrollbar-thumb: #2a2a3d;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8f9fc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f3f4f8;
    --bg-nav: rgba(248, 249, 252, 0.9);

    --text-primary: #1a1a2e;
    --text-secondary: #555570;
    --text-tertiary: #8888a0;

    --accent-primary: #4f46e5;
    --accent-secondary: #6366f1;
    --accent-glow: rgba(79, 70, 229, 0.08);
    --accent-glow-strong: rgba(79, 70, 229, 0.15);

    --gradient-primary: linear-gradient(135deg, #4f46e5, #7c3aed, #a855f7);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(248, 249, 252, 0.9));
    --gradient-hero: radial-gradient(ellipse at 20% 50%, rgba(79, 70, 229, 0.05) 0%, transparent 60%),
                     radial-gradient(ellipse at 80% 20%, rgba(124, 58, 237, 0.04) 0%, transparent 50%);

    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(79, 70, 229, 0.08);

    --code-bg: #f1f3f9;
    --code-keyword: #7c3aed;
    --code-string: #059669;
    --code-type: #2563eb;
    --code-prop: #1a1a2e;
    --code-var: #d97706;

    --skill-bar-bg: rgba(0, 0, 0, 0.06);
    --timeline-line: rgba(79, 70, 229, 0.2);

    --scrollbar-track: #f0f0f5;
    --scrollbar-thumb: #c5c5d5;
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
}

/* Skip Link (Accessibility) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-primary);
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    z-index: 10000;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 10px;
}

/* Focus Visible (Accessibility) */
*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 3px;
    border-radius: 2px;
}

/* Arabic Font */
[dir="rtl"] body,
[dir="rtl"] {
    font-family: var(--font-ar), var(--font-main), sans-serif;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-primary); }

/* Selection */
::selection {
    background: var(--accent-primary);
    color: white;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

img {
    max-width: 100%;
    display: block;
}

ul { list-style: none; }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Cursor Glow ---- */
.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s;
    opacity: 0;
}

.cursor-glow.active { opacity: 1; }

/* ---- Particles Canvas ---- */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ---- Navigation ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: var(--bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-code);
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo-bracket {
    color: var(--accent-primary);
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--accent-glow);
}

.nav-link.active {
    color: var(--accent-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.75rem;
    transition: var(--transition);
    font-family: var(--font-main);
}

.lang-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-glow);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-glow);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: block; }
[data-theme="light"] .theme-toggle .fa-sun { display: block; }
[data-theme="light"] .theme-toggle .fa-moon { display: none; }

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---- Hero Section ---- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: 120px 0 60px;
    background: var(--gradient-hero);
}

.hero-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -1.5px;
}

[dir="rtl"] .hero-title {
    letter-spacing: 0;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-wave {
    display: inline-block;
    animation: wave 2.5s infinite;
    transform-origin: 70% 70%;
    opacity: 0.55;
    filter: grayscale(30%);
}

@keyframes wave {
    0%, 60%, 100% { transform: rotate(0); }
    10%, 30% { transform: rotate(14deg); }
    20% { transform: rotate(-8deg); }
    40% { transform: rotate(-4deg); }
    50% { transform: rotate(10deg); }
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 20px;
    min-height: 2em;
}

.typewriter-cursor {
    color: var(--accent-primary);
    animation: blink 1s infinite;
    font-weight: 300;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-description strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Buttons */
.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 48px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 12px 16px;
}

.btn-ghost:hover {
    color: var(--accent-primary);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-plus {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-image-wrapper {
    position: relative;
    width: 350px;
    height: 350px;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.hero-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 2;
}

.hero-image-glow {
    position: absolute;
    inset: -20px;
    background: var(--gradient-primary);
    opacity: 0.15;
    border-radius: var(--radius-xl);
    filter: blur(40px);
    z-index: 0;
    animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { opacity: 0.15; transform: scale(1); }
    50% { opacity: 0.25; transform: scale(1.05); }
}

.hero-image-border {
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    z-index: 1;
    opacity: 0.6;
}

/* Floating Badges */
.floating-badge {
    position: absolute;
    width: auto;
    height: auto;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    z-index: 3;
    animation: float 6s ease-in-out infinite;
    opacity: 0.55;
    pointer-events: auto;
    filter: drop-shadow(0 0 6px currentColor);
}

.floating-badge img {
    border-radius: 0;
    width: 28px;
    height: 28px;
    opacity: 0.5;
}

/* Top-left: Angular */
.badge-1 {
    top: -8%;
    left: -14%;
    color: #dd0031;
    animation-delay: 0s;
}

/* Top-right: TypeScript */
.badge-2 {
    top: -10%;
    right: -14%;
    animation-delay: 1s;
}

/* Bottom-left: JavaScript */
.badge-3 {
    bottom: -8%;
    left: -16%;
    color: #f0db4f;
    animation-delay: 2s;
}

/* Bottom-right: SASS */
.badge-4 {
    bottom: -10%;
    right: -14%;
    color: #cc6699;
    animation-delay: 3s;
}

/* Mid-left: Git */
.badge-5 {
    top: 20%;
    left: -22%;
    color: #f05032;
    animation-delay: 1.5s;
}

/* Mid-right: CSS3 */
.badge-6 {
    top: 20%;
    right: -20%;
    color: #264de4;
    animation-delay: 4s;
}

/* Lower-right: Calculator (accounting) */
.badge-7 {
    bottom: 20%;
    right: -20%;
    color: #f59e0b;
    font-size: 1.5rem;
    animation-delay: 2.5s;
    opacity: 0.4;
}

/* Lower-left: Chart (accounting) */
.badge-8 {
    bottom: 20%;
    left: -22%;
    color: #34d399;
    font-size: 1.5rem;
    animation-delay: 3.5s;
    opacity: 0.4;
}

@keyframes float {
    0%, 100% { margin-top: 0; }
    50% { margin-top: -15px; }
}

/* Repel effect */
.floating-badge[data-repel] {
    transition: translate 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), scale 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
    cursor: default;
    translate: 0 0;
    scale: 1;
}

.floating-badge[data-repel].repelled {
    animation-play-state: paused;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 2;
}

.scroll-indicator a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
}

.scroll-text {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 500;
}

.scroll-mouse {
    width: 24px;
    height: 38px;
    border: 2px solid var(--text-tertiary);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-dot {
    width: 3px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 2px;
    animation: scroll-down 2s infinite;
}

@keyframes scroll-down {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(12px); opacity: 0; }
}

/* ---- Section Common ---- */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

[dir="rtl"] .section-tag {
    letter-spacing: 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

[dir="rtl"] .section-title {
    letter-spacing: 0;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 0 auto;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 20px auto 0;
}

/* ---- About Section ---- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-info-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.info-card:hover {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
}

.info-card i {
    font-size: 1.2rem;
    color: var(--accent-primary);
    width: 20px;
    text-align: center;
}

.info-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.info-value {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Code Window */
.code-window {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
}

.code-dots {
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.code-filename {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-family: var(--font-code);
}

.code-body {
    padding: 24px;
    overflow-x: auto;
}

.code-body pre {
    font-family: var(--font-code);
    font-size: 0.82rem;
    line-height: 1.8;
}

.code-body code {
    font-family: var(--font-code);
}

.code-keyword { color: var(--code-keyword); font-weight: 600; }
.code-string { color: var(--code-string); }
.code-type { color: var(--code-type); }
.code-prop { color: var(--code-prop); }
.code-var { color: var(--code-var); }

/* ---- Skills Section ---- */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.skill-category:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.skill-category-header i {
    font-size: 1.3rem;
    color: var(--accent-primary);
}

.skill-category-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.skill-item {
    display: grid;
    grid-template-columns: 36px 110px 1fr;
    align-items: center;
    gap: 12px;
}

[dir="rtl"] .skill-item {
    grid-template-columns: 36px 120px 1fr;
}

.skill-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-glow);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--accent-primary);
}

.skill-icon.rxjs-icon,
.skill-icon.ngrx-icon { color: var(--accent-primary); }

.skill-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
}

.skill-bar {
    height: 6px;
    background: var(--skill-bar-bg);
    border-radius: 3px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    width: 0;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: width;
}

/* Skill Tags */
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    padding: 8px 18px;
    background: var(--accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-secondary);
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--accent-glow-strong);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ---- Experience Section ---- */
.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--timeline-line);
}

[dir="rtl"] .timeline::before {
    left: auto;
    right: 24px;
}

.timeline-item {
    position: relative;
    padding-left: 70px;
    padding-bottom: 40px;
}

[dir="rtl"] .timeline-item {
    padding-left: 0;
    padding-right: 70px;
}

.timeline-dot {
    position: absolute;
    left: 10px;
    top: 0;
    width: 30px;
    height: 30px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.7rem;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

[dir="rtl"] .timeline-dot {
    left: auto;
    right: 10px;
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.timeline-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(52, 211, 153, 0.1);
    color: #34d399;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.timeline-title {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.timeline-company {
    font-size: 1rem;
    color: var(--accent-secondary);
    font-weight: 600;
    margin-bottom: 8px;
}

.company-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.company-link:hover {
    color: var(--accent-primary);
}

.company-link i {
    font-size: 1rem;
    color: var(--accent-primary);
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.timeline-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.timeline-details li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-details li i {
    color: #34d399;
    font-size: 0.8rem;
    margin-top: 5px;
    flex-shrink: 0;
}

.timeline-details li strong {
    color: var(--text-primary);
}

.timeline-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-tech span {
    padding: 4px 12px;
    background: var(--accent-glow);
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--accent-secondary);
}

/* Secondary Timeline (Accounting) */
.timeline-dot-secondary {
    background: linear-gradient(135deg, #f59e0b, #d97706) !important;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.2) !important;
}

.timeline-badge-secondary {
    background: rgba(245, 158, 11, 0.1) !important;
    color: #f59e0b !important;
}

.timeline-content-compact {
    opacity: 0.9;
}

.timeline-content-compact .timeline-title {
    font-size: 1.15rem;
}

.timeline-summary {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-style: italic;
}

/* ---- Projects Section ---- */
.project-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
}

.project-card.hidden {
    display: none;
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-glow) 0%, var(--bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--accent-primary);
    opacity: 0.7;
}

.project-placeholder.backend-placeholder {
    background: linear-gradient(135deg, rgba(52, 211, 153, 0.1) 0%, var(--bg-secondary) 100%);
    color: #34d399;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link-tag {
    padding: 8px 20px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s;
}

a.project-link-tag:hover {
    transform: scale(1.05);
}

a.project-link-tag i {
    margin-right: 6px;
}

.project-info {
    padding: 24px;
}

.project-category {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

[dir="rtl"] .project-category {
    letter-spacing: 0;
}

.project-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 8px 0 12px;
}

.project-description {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.project-tech span {
    padding: 4px 10px;
    background: var(--accent-glow);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--accent-secondary);
}

/* ---- Project Modal ---- */
.project-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.project-modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
}

.modal-container {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow-y: auto;
    transform: translateY(30px) scale(0.95);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-lg);
}

.project-modal.active .modal-container {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.5);
    border: none;
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

[dir="rtl"] .modal-close {
    right: auto;
    left: 16px;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: rotate(90deg);
}

.modal-image-wrapper {
    position: relative;
    width: 100%;
    height: 300px;
    background: var(--bg-secondary);
    overflow: hidden;
}

.modal-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.3s;
}

.modal-image-wrapper img.loaded {
    opacity: 1;
}

.modal-image-wrapper img.error {
    opacity: 0;
    position: absolute;
}

.modal-image-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--accent-primary);
    transition: opacity 0.3s;
}

.modal-image-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-image-fallback {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-tertiary);
    font-size: 1rem;
}

.modal-image-fallback i {
    font-size: 3rem;
    opacity: 0.5;
}

.modal-image-fallback.visible {
    display: flex;
}

.modal-body {
    padding: 28px 32px 32px;
}

.modal-category {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.modal-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 8px 0 16px;
}

.modal-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.modal-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.modal-tech span {
    padding: 4px 14px;
    background: var(--accent-glow);
    color: var(--accent-secondary);
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

.modal-live-btn {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* Make project cards show pointer cursor */
.project-card[role="button"] {
    cursor: pointer;
}

/* ---- Certifications Section ---- */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    transition: var(--transition);
    position: relative;
}

.cert-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.cert-icon {
    width: 56px;
    height: 56px;
    background: var(--accent-glow);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.cert-icon-orange { color: #f59e0b; background: rgba(245, 158, 11, 0.1); }
.cert-icon-red { color: #dd0031; background: rgba(221, 0, 49, 0.1); }
.cert-icon-anthropic { color: #d4a27f; background: rgba(212, 162, 127, 0.1); }

.cert-card-link {
    text-decoration: none;
    color: inherit;
    position: relative;
    cursor: pointer;
}

.cert-verify-icon {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    opacity: 0;
    transition: var(--transition);
}

[dir="rtl"] .cert-verify-icon {
    right: auto;
    left: 16px;
}

.cert-card-link:hover .cert-verify-icon {
    opacity: 1;
}

.cert-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.cert-org {
    font-size: 0.9rem;
    color: var(--accent-secondary);
    font-weight: 500;
    margin-bottom: 4px;
}

.cert-detail {
    font-size: 0.82rem;
    color: var(--text-tertiary);
}

/* ---- Contact Section ---- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
    transform: translateX(8px);
}

[dir="rtl"] .contact-card:hover {
    transform: translateX(-8px);
}

.contact-card-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-glow);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.contact-card-icon.linkedin-icon { color: #0a66c2; background: rgba(10, 102, 194, 0.1); }
.contact-card-icon.whatsapp-icon { color: #25d366; background: rgba(37, 211, 102, 0.1); }

.contact-card-info h3 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.contact-card-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.contact-arrow {
    margin-left: auto;
    color: var(--text-tertiary);
    transition: var(--transition);
}

[dir="rtl"] .contact-arrow {
    margin-left: 0;
    margin-right: auto;
    transform: scaleX(-1);
}

.contact-card:hover .contact-arrow {
    color: var(--accent-primary);
    transform: translateX(4px);
}

[dir="rtl"] .contact-card:hover .contact-arrow {
    transform: scaleX(-1) translateX(4px);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group label {
    position: absolute;
    left: 16px;
    top: 16px;
    color: var(--text-tertiary);
    font-size: 0.95rem;
    pointer-events: none;
    transition: var(--transition);
}

[dir="rtl"] .form-group label {
    left: auto;
    right: 16px;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -10px;
    left: 12px;
    font-size: 0.78rem;
    color: var(--accent-primary);
    background: var(--bg-card);
    padding: 0 6px;
}

[dir="rtl"] .form-group input:focus + label,
[dir="rtl"] .form-group input:not(:placeholder-shown) + label,
[dir="rtl"] .form-group textarea:focus + label,
[dir="rtl"] .form-group textarea:not(:placeholder-shown) + label {
    left: auto;
    right: 12px;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 16px;
    font-size: 1rem;
}

/* ---- Footer ---- */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    font-family: var(--font-code);
    margin-bottom: 12px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.footer-socials {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.footer-socials a {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition);
}

.footer-socials a:hover {
    background: var(--accent-glow);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-3px);
}

.footer-copyright {
    font-size: 0.82rem;
    color: var(--text-tertiary);
}

/* ---- Back to Top ---- */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 1rem;
    cursor: pointer;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}

[dir="rtl"] .back-to-top {
    right: auto;
    left: 20px;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
}

/* ---- Animations ---- */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; text-align: center; gap: 40px; }
    .hero-content { order: 2; }
    .hero-image { order: 1; }
    .hero-description { margin: 0 auto 32px; }
    .hero-actions { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-image-wrapper { width: 280px; height: 280px; }

    .about-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root { --section-padding: 70px 0; }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100dvh;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 80px 30px 30px;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }

    [dir="rtl"] .nav-menu {
        right: auto;
        left: -100%;
    }

    .nav-menu.active {
        right: 0;
    }

    [dir="rtl"] .nav-menu.active {
        left: 0;
    }

    .nav-link {
        padding: 12px 20px;
        font-size: 1rem;
    }

    .nav-toggle { display: flex; }

    .hero { padding: 100px 0 40px; }
    .hero-title { font-size: 2.2rem; }
    .hero-image-wrapper { width: 220px; height: 220px; }
    .floating-badge { font-size: 1.2rem; }

    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.8rem; }

    .projects-grid { grid-template-columns: 1fr; }
    .about-info-cards { grid-template-columns: 1fr; }

    .modal-container { width: 95%; max-height: 95vh; border-radius: var(--radius-md); }
    .modal-image-wrapper { height: 200px; }
    .modal-body { padding: 20px; }
    .modal-title { font-size: 1.3rem; }
    .modal-description { font-size: 0.9rem; }

    .skill-item { grid-template-columns: 32px 90px 1fr; gap: 8px; }
    .skill-icon { width: 32px; height: 32px; font-size: 0.9rem; }

    .scroll-indicator { display: none; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .btn { justify-content: center; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .contact-card { flex-direction: column; text-align: center; }
    .contact-arrow { display: none; }
}