/* ==========================================================================
   Premium Design System & Reset
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Fonts */
    --font-primary: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'Fira Code', monospace;

    /* Transition Speeds */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: 0.8s cubic-bezier(0.25, 1, 0.5, 1);

    /* Layout Limits */
    --container-max-width: 1200px;
    --header-height: 80px;

    /* Theme Tokens: Dark Mode (Default) */
    --bg-main: hsl(224, 25%, 9%);
    --bg-surface: hsla(224, 20%, 14%, 0.65);
    --bg-surface-opaque: hsl(224, 20%, 14%);
    --border-color: hsla(224, 20%, 25%, 0.4);
    --border-color-hover: hsla(170, 75%, 45%, 0.3);
    
    --text-primary: hsl(220, 20%, 94%);
    --text-secondary: hsl(220, 10%, 72%);
    --text-muted: hsl(220, 8%, 50%);

    --color-primary: hsl(170, 75%, 45%);        /* Emerald / Teal */
    --color-primary-rgb: 23, 206, 172;
    --color-secondary: hsl(265, 80%, 65%);      /* Vibrant Indigo / Violet */
    --color-accent: hsl(170, 75%, 45%);
    --color-glow: hsla(170, 75%, 45%, 0.15);

    --shadow-sm: 0 4px 10px hsla(0, 0%, 0%, 0.15);
    --shadow-md: 0 10px 30px hsla(0, 0%, 0%, 0.25);
    --shadow-lg: 0 20px 50px hsla(0, 0%, 0%, 0.35);

    --card-blur: blur(12px);
    --btn-radius: 8px;
    --card-radius: 16px;
}

/* Light Theme Variables Override */
[data-theme="light"] {
    --bg-main: hsl(220, 20%, 97%);
    --bg-surface: hsla(0, 0%, 100%, 0.75);
    --bg-surface-opaque: hsl(0, 0%, 100%);
    --border-color: hsla(220, 15%, 85%, 0.7);
    --border-color-hover: hsla(170, 80%, 38%, 0.4);
    
    --text-primary: hsl(224, 25%, 12%);
    --text-secondary: hsl(220, 12%, 40%);
    --text-muted: hsl(220, 10%, 55%);

    --color-primary: hsl(170, 80%, 38%);
    --color-primary-rgb: 19, 175, 146;
    --color-secondary: hsl(265, 75%, 55%);
    --color-accent: hsl(170, 80%, 38%);
    --color-glow: hsla(170, 80%, 38%, 0.08);

    --shadow-sm: 0 4px 10px hsla(220, 15%, 80%, 0.1);
    --shadow-md: 0 10px 30px hsla(220, 15%, 80%, 0.15);
    --shadow-lg: 0 20px 50px hsla(220, 15%, 80%, 0.2);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

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

li {
    list-style: none;
}

button, input, textarea {
    font-family: inherit;
    background: none;
    border: none;
    outline: none;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
    border: 2px solid var(--bg-main);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ==========================================================================
   Helper Classes & Globals
   ========================================================================== */
.container {
    width: 90%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 15px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Glow Background Elements */
.glow-bg-element {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.45;
    transition: opacity var(--transition-slow);
}

.glow-1 {
    top: 15%;
    right: 5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-primary), transparent 70%);
}

.glow-2 {
    top: 55%;
    left: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-secondary), transparent 70%);
}

[data-theme="light"] .glow-bg-element {
    opacity: 0.15;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    font-weight: 600;
    border-radius: var(--btn-radius);
    cursor: pointer;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), hsl(170, 75%, 38%));
    color: hsl(224, 25%, 9%);
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(var(--color-primary-rgb), 0.4);
    color: hsl(224, 25%, 9%);
}

.btn-outline {
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    background-color: rgba(var(--color-primary-rgb), 0.05);
    transform: translateY(-2px);
}

/* Section Common Styling */
section {
    padding: 100px 0;
    position: relative;
}

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

.section-tag {
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
}

.section-underline {
    width: 60px;
    height: 3px;
    background-color: var(--color-primary);
    margin: 15px auto 0;
    border-radius: 2px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    height: var(--header-height);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: hsla(224, 25%, 9%, 0.65);
    border-bottom: 1.5px solid var(--border-color);
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    display: flex;
    align-items: center;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="light"] .header {
    background-color: hsla(220, 20%, 97%, 0.65);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: -0.5px;
}

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

.nav-menu ul {
    display: flex;
    gap: 30px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.theme-toggle,
.mobile-menu-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1.5px solid var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.theme-toggle:hover,
.mobile-menu-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: rgba(var(--color-primary-rgb), 0.05);
}

.mobile-menu-toggle {
    display: none;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
    padding-top: calc(var(--header-height) + 60px);
    padding-bottom: 100px;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 25px;
    color: var(--text-secondary);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
    position: relative;
}

.pulse-dot::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(3); opacity: 0; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 15px;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.cursor {
    animation: blink 0.8s infinite;
    color: var(--color-primary);
    font-weight: 400;
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin-bottom: 35px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 45px;
}

.hero-socials {
    display: flex;
    gap: 20px;
}

.hero-socials a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1.5px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.hero-socials a:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background-color: rgba(var(--color-primary-rgb), 0.05);
    transform: translateY(-3px);
}

.hero-image-wrapper {
    position: relative;
    justify-self: center;
}

.image-border-glow {
    position: relative;
    padding: 8px;
    border-radius: var(--card-radius);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    box-shadow: 0 10px 40px var(--color-glow);
}

.hero-image-container {
    border-radius: calc(var(--card-radius) - 6px);
    overflow: hidden;
    width: 320px;
    height: 320px;
    background-color: var(--bg-surface-opaque);
}

.hero-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.hero-image-wrapper:hover .hero-avatar {
    transform: scale(1.05);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.about-heading {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-text {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 35px 0;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 25px;
    text-align: center;
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.stat-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-primary);
    display: block;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.resume-btn {
    margin-top: 10px;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.skills-category-card {
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 40px 30px;
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.skills-category-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.category-icon-wrapper {
    width: 60px;
    height: 60px;
    background-color: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.skills-category-card h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 25px;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skill-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.progress-bar-container {
    width: 100%;
    height: 6px;
    background-color: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 3px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1.5s cubic-bezier(0.1, 1, 0.1, 1);
}

.scroll-reveal.active .progress-bar {
    transform: scaleX(1);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 22px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 30px;
    border: 1.5px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.filter-btn.active {
    background-color: var(--color-primary);
    color: hsl(224, 25%, 9%);
    border-color: var(--color-primary);
    box-shadow: 0 4px 15px rgba(var(--color-primary-rgb), 0.25);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.project-card {
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: 0 15px 35px var(--color-glow);
}

.project-media {
    position: relative;
    height: 220px;
    width: 100%;
    overflow: hidden;
}

.project-placeholder-media {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    color: rgba(255, 255, 255, 0.85);
}

.gradient-1 { background: linear-gradient(135deg, hsl(170, 75%, 45%), hsl(220, 60%, 35%)); }
.gradient-2 { background: linear-gradient(135deg, hsl(265, 80%, 65%), hsl(340, 75%, 55%)); }
.gradient-3 { background: linear-gradient(135deg, hsl(190, 80%, 45%), hsl(265, 75%, 55%)); }
.gradient-4 { background: linear-gradient(135deg, hsl(140, 70%, 40%), hsl(200, 75%, 40%)); }

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: hsla(224, 25%, 9%, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

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

.project-link {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: hsl(224, 25%, 9%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transform: translateY(20px);
    transition: all var(--transition-fast);
}

.project-link:hover {
    background-color: var(--text-primary);
    transform: scale(1.1) translateY(0);
}

.project-card:hover .project-link {
    transform: translateY(0);
}

.project-info {
    padding: 25px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.project-tech-badges {
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 500;
}

.project-info h3 {
    font-size: 1.35rem;
    font-weight: 700;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ==========================================================================
   Experience Timeline
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 860px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--border-color);
    top: 0;
    bottom: 0;
    left: 32px;
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: 50px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    background-color: var(--bg-main);
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    left: 25px;
    top: 5px;
    z-index: 2;
    transition: background-color var(--transition-fast);
}

.timeline-item:hover .timeline-dot {
    background-color: var(--color-primary);
    box-shadow: 0 0 10px var(--color-primary);
}

.timeline-date {
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-content {
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 30px;
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    transition: border-color var(--transition-fast);
}

.timeline-content:hover {
    border-color: var(--color-primary);
}

.timeline-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 5px;
}

.timeline-content h4 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 50px;
    align-items: flex-start;
}

.contact-info-panel h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-info-panel p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.05rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-detail-item {
    display: flex;
    gap: 20px;
    align-items: center;
}

.detail-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.contact-detail-item h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-detail-item a,
.contact-detail-item p {
    font-size: 1.05rem;
    font-weight: 600;
}

.contact-detail-item a:hover {
    color: var(--color-primary);
}

.contact-form-container {
    background-color: var(--bg-surface);
    border: 1.5px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 40px;
    backdrop-filter: var(--card-blur);
    -webkit-backdrop-filter: var(--card-blur);
    box-shadow: var(--shadow-md);
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border-radius: var(--btn-radius);
    border: 1.5px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

[data-theme="light"] .form-group input,
[data-theme="light"] .form-group textarea {
    background-color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 10px var(--color-glow);
    background-color: var(--bg-surface-opaque);
}

.form-submit-btn {
    width: 100%;
    justify-content: center;
    padding: 14px;
    margin-top: 10px;
}

/* ==========================================================================
   Footer Section
   ========================================================================== */
.footer {
    padding: 40px 0;
    border-top: 1.5px solid var(--border-color);
    background-color: var(--bg-main);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-socials {
    display: flex;
    gap: 15px;
}

.footer-socials a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1.5px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.footer-socials a:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    background-color: rgba(var(--color-primary-rgb), 0.05);
    transform: translateY(-2px);
}

.back-to-top {
    position: absolute;
    right: 15px;
    top: -65px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: hsl(224, 25%, 9%);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.back-to-top:hover {
    background-color: var(--text-primary);
    transform: translateY(-5px);
}

/* ==========================================================================
   Animations & Transitions
   ========================================================================== */
/* Scroll Entrance Effects */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Hero reveal classes loaded on page mount */
.reveal {
    opacity: 0;
    transform: translateY(30px);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.hero-content .reveal:nth-child(1) { transition-delay: 0.1s; }
.hero-content .reveal:nth-child(2) { transition-delay: 0.2s; }
.hero-content .reveal:nth-child(3) { transition-delay: 0.3s; }
.hero-content .reveal:nth-child(4) { transition-delay: 0.4s; }
.hero-content .reveal:nth-child(5) { transition-delay: 0.5s; }
.hero-content .reveal:nth-child(6) { transition-delay: 0.6s; }
.hero-image-wrapper.reveal { transition-delay: 0.3s; }

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 992px) {
    :root {
        --header-height: 70px;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-badge {
        justify-content: center;
    }

    .hero-desc {
        margin: 0 auto 30px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-socials {
        justify-content: center;
    }

    .hero-image-wrapper {
        order: -1;
    }

    .hero-image-container {
        width: 280px;
        height: 280px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-info-panel {
        text-align: center;
    }

    .contact-details {
        align-items: center;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-main);
        transition: left var(--transition-normal);
        padding: 50px 0;
        border-top: 1.5px solid var(--border-color);
    }

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

    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: 35px;
    }

    .nav-link {
        font-size: 1.25rem;
    }

    .hero-title {
        font-size: 2.75rem;
    }

    .hero-subtitle {
        font-size: 1.6rem;
    }

    .about-stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .timeline::after {
        left: 20px;
    }

    .timeline-dot {
        left: 13px;
    }

    .timeline-item {
        padding-left: 50px;
    }

    .contact-form-container {
        padding: 30px 20px;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .back-to-top {
        position: static;
        margin: 10px auto 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-subtitle {
        font-size: 1.35rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-image-container {
        width: 230px;
        height: 230px;
    }
}

/* ==========================================================================
   WhatsApp Floating Button
   ========================================================================== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: #fff !important;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.whatsapp-float:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

.whatsapp-float::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid #25d366;
    top: 0;
    left: 0;
    animation: wa-pulse 2s infinite;
}

@keyframes wa-pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* Adjust position on small mobile devices to avoid overlap */
@media (max-width: 480px) {
    .whatsapp-float {
        bottom: 20px;
        left: 20px;
        width: 50px;
        height: 50px;
        font-size: 26px;
    }
}