/* =============================================================================
   DARK MODE & THEME ENHANCEMENTS
   ============================================================================= */

/* Dark Mode Variables */
:root[data-theme="dark"] {
    --primary-color: #60a5fa;
    --secondary-color: #3b82f6;
    --accent-color: #06b6d4;
    --text-dark: #f3f4f6;
    --text-light: #d1d5db;
    --bg-light: #1f2937;
    --bg-white: #111827;
    --border-color: #374151;
    --success-color: #34d399;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.5);
}

/* Theme Toggle Button */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-dark);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background: var(--bg-light);
    transform: rotate(15deg);
}

.theme-toggle i {
    transition: transform 0.5s ease;
}

:root[data-theme="dark"] .theme-toggle i::before {
    content: "\f185"; /* fa-sun */
}

/* Dark Mode Specific Styles */
:root[data-theme="dark"] body {
    background-color: var(--bg-white);
    color: var(--text-light);
}

:root[data-theme="dark"] nav {
    background: rgba(17, 24, 39, 0.95);
}

:root[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
}

:root[data-theme="dark"] .decorative-circle {
    opacity: 0.05;
}

:root[data-theme="dark"] .stats {
    background: var(--bg-light);
}

:root[data-theme="dark"] .section {
    background: var(--bg-white);
}

:root[data-theme="dark"] .skill-card,
:root[data-theme="dark"] .project-card,
:root[data-theme="dark"] .timeline-item,
:root[data-theme="dark"] .review-card {
    background: var(--bg-light);
    border-color: var(--border-color);
}

:root[data-theme="dark"] .skill-card:hover,
:root[data-theme="dark"] .project-card:hover,
:root[data-theme="dark"] .review-card:hover {
    box-shadow: 0 8px 20px rgba(96, 165, 250, 0.2);
}

:root[data-theme="dark"] footer {
    background: var(--bg-light);
    color: var(--text-light);
}

/* Typing Animation */
.typing-text {
    display: inline-block;
    border-right: 3px solid var(--accent-color);
    padding-right: 5px;
    animation: blink 0.7s steps(1) infinite;
}

@keyframes blink {
    50% {
        border-color: transparent;
    }
}

.subtitle {
    min-height: 2em;
}

/* AOS Animation Override for Dark Mode */
:root[data-theme="dark"] [data-aos] {
    transition-property: transform, opacity, background-color, color, border-color;
}

/* Project Filter Buttons */
.project-filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.filter-btn {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    color: var(--text-dark);
    padding: 0.6rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-btn:hover {
    background: var(--bg-light);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.filter-btn .count {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.1rem 0.5rem;
    border-radius: 12px;
    font-size: 0.85rem;
}

.project-card {
    transition: all 0.4s ease;
}

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

.project-card.filtered-out {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

/* Enhanced Skill Progress Bars with Animation */
.skill-progress {
    position: relative;
    overflow: visible;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg,
        rgba(255,255,255,0.1) 0%,
        rgba(255,255,255,0.3) 50%,
        rgba(255,255,255,0.1) 100%
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        width: 0;
        left: 0;
    }
    50% {
        width: 30%;
        left: 70%;
    }
    100% {
        width: 0;
        left: 100%;
    }
}

/* Lazy Loading Images */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.5s ease;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Mobile Responsive Adjustments for Dark Mode Toggle */
@media (max-width: 768px) {
    .nav-controls {
        position: absolute;
        right: 1rem;
        top: 50%;
        transform: translateY(-50%);
    }

    .theme-toggle {
        position: relative;
        z-index: 1001;
    }

    .hamburger {
        position: relative;
        z-index: 1001;
    }
}

/* Smooth Transitions for Theme Switch */
body,
nav,
.hero,
.stats,
.section,
.skill-card,
.project-card,
.timeline-item,
.review-card,
footer,
.btn-primary,
.btn-secondary {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Enhanced Focus States for Accessibility */
.theme-toggle:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .theme-toggle,
    .back-to-top,
    .hamburger {
        display: none;
    }

    :root[data-theme="dark"] {
        --text-dark: #000;
        --text-light: #333;
        --bg-white: #fff;
        --bg-light: #f5f5f5;
    }
}