/* ============================================================
   HAMID RAFIQUE — CYBERSECURITY PORTFOLIO
   Stylesheet (style.css)
   ============================================================ */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    --bg-primary: #020810;
    --bg-surface: #0A1628;
    --bg-surface-hover: #0D1F3C;
    --bg-card: #0A1628;

    --accent-cyan: #00F5FF;
    --accent-green: #00FF88;
    --accent-orange: #FF6B35;
    --accent-purple: #A855F7;
    --accent-red: #FF3366;

    --text-primary: #C8D8E8;
    --text-secondary: #7A8BA0;
    --text-heading: #E8F0F8;

    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'IBM Plex Mono', monospace;

    --nav-height: 70px;
    --container-max: 1200px;
    --border-radius: 8px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s ease;
    --transition-slow: 0.6s ease;

    --glow-cyan: 0 0 20px rgba(0, 245, 255, 0.3), 0 0 60px rgba(0, 245, 255, 0.1);
    --glow-green: 0 0 20px rgba(0, 255, 136, 0.3), 0 0 60px rgba(0, 255, 136, 0.1);

    /* Focus ring variable for accessibility (Fix 6) */
    --focus-ring: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--accent-cyan), 0 0 12px rgba(0, 245, 255, 0.4);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-cyan) var(--bg-primary);
}

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

/* Custom scrollbar for webkit */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-cyan);
    border-radius: 3px;
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
    cursor: crosshair;
}
a:hover {
    color: var(--accent-green);
}

button {
    cursor: crosshair;
}

::selection {
    background: rgba(0, 245, 255, 0.25);
    color: #fff;
}

/* ===== ACCESSIBILITY — FOCUS STATES (Fix 6) ===== */
a:focus-visible,
button:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--border-radius);
}

.nav-link:focus-visible {
    box-shadow: var(--focus-ring);
    border-radius: 4px;
}

.social-icon:focus-visible,
.social-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.filter-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.btn:focus-visible,
.btn-sm:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.btn-expand:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.copy-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: 4px;
}

.back-to-top:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.hamburger:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: 4px;
}

/* Prefers reduced motion (Fix 4) */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    #neural-canvas {
        display: none;
    }
}

/* ===== UTILITY CLASSES ===== */
.text-cyan { color: var(--accent-cyan); }
.text-green { color: var(--accent-green); }
.text-orange { color: var(--accent-orange); }

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

.section {
    padding: 100px 0;
    position: relative;
}

/* ===== SCROLL PROGRESS BAR ===== */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
    z-index: 10000;
    transition: width 0.05s linear;
    box-shadow: 0 0 8px var(--accent-cyan);
}

/* ===== ANIMATED CANVAS BACKGROUND ===== */
#neural-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.35;
    pointer-events: none;
}

/* ===== NAVIGATION ===== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition-normal), backdrop-filter var(--transition-normal), box-shadow var(--transition-normal);
    background: transparent;
}

#navbar.scrolled {
    background: rgba(2, 8, 16, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 245, 255, 0.1);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
    letter-spacing: 2px;
    text-decoration: none;
}
.nav-logo:hover { color: var(--accent-cyan); }
.logo-bracket { color: var(--text-secondary); }
.logo-cursor {
    animation: blink 1s steps(1) infinite;
    color: var(--accent-cyan);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-cyan);
    transition: width var(--transition-normal);
    box-shadow: 0 0 6px var(--accent-cyan);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-cyan);
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: 4px;
    z-index: 1100;
}
.hamburger-line {
    width: 28px;
    height: 2px;
    background: var(--accent-cyan);
    transition: transform var(--transition-normal), opacity var(--transition-fast);
    border-radius: 2px;
}
.hamburger.active .hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}
.hamburger.active .hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 8, 16, 0.97);
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}
.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}
.mobile-nav-links {
    list-style: none;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.mobile-nav-link {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--text-primary);
    letter-spacing: 3px;
    text-transform: uppercase;
    transition: color var(--transition-fast);
}
.mobile-nav-link:hover {
    color: var(--accent-cyan);
}

/* ===== HERO SECTION ===== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    padding-top: var(--nav-height);
}

.hero-container {
    text-align: center;
    max-width: 900px;
    padding: 0 24px;
}

/* Boot Sequence */
.boot-sequence {
    text-align: left;
    max-width: 520px;
    margin: 0 auto 40px;
    font-size: 0.9rem;
    color: var(--accent-green);
}
.boot-line {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s ease, transform 0.4s ease;
    margin-bottom: 6px;
}
.boot-line.visible {
    opacity: 1;
    transform: translateY(0);
}
.prompt-symbol {
    color: var(--accent-cyan);
    margin-right: 8px;
}

/* Hero Content */
.hero-content {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease 0.3s, transform 0.8s ease 0.3s;
}
.hero-content.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 6vw, 4.5rem);
    font-weight: 900;
    color: var(--text-heading);
    letter-spacing: 4px;
    text-shadow: 0 0 30px rgba(0, 245, 255, 0.4), 0 0 80px rgba(0, 245, 255, 0.15);
    margin-bottom: 20px;
    line-height: 1.1;
}

/* Glitch effect for hero name */
.glitch-text {
    position: relative;
}
.glitch-text::before,
.glitch-text::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
}
.glitch-text.glitching::before {
    animation: glitch-1 0.4s ease forwards;
    color: var(--accent-red);
    z-index: -1;
}
.glitch-text.glitching::after {
    animation: glitch-2 0.4s ease forwards;
    color: var(--accent-cyan);
    z-index: -1;
}

@keyframes glitch-1 {
    0% { opacity: 0.8; transform: translate(-3px, -2px); clip-path: inset(20% 0 40% 0); }
    25% { opacity: 0.6; transform: translate(3px, 2px); clip-path: inset(60% 0 10% 0); }
    50% { opacity: 0.4; transform: translate(-2px, 1px); clip-path: inset(10% 0 70% 0); }
    100% { opacity: 0; transform: translate(0); clip-path: inset(0); }
}
@keyframes glitch-2 {
    0% { opacity: 0.8; transform: translate(3px, 2px); clip-path: inset(40% 0 20% 0); }
    25% { opacity: 0.6; transform: translate(-3px, -2px); clip-path: inset(10% 0 60% 0); }
    50% { opacity: 0.4; transform: translate(2px, -1px); clip-path: inset(70% 0 10% 0); }
    100% { opacity: 0; transform: translate(0); clip-path: inset(0); }
}

/* Typewriter area */
.hero-typewriter {
    font-size: clamp(0.9rem, 2vw, 1.15rem);
    margin-bottom: 24px;
    min-height: 2em;
    color: var(--text-primary);
}
.terminal-prompt {
    color: var(--accent-green);
    font-weight: 600;
}
.typewriter-cursor {
    animation: blink 0.7s steps(1) infinite;
    color: var(--accent-cyan);
}

.hero-tagline {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 36px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: var(--border-radius);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    border-color: var(--accent-cyan);
}
.btn-primary:hover {
    background: transparent;
    color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}

.btn-outline {
    background: transparent;
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}
.btn-outline:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    box-shadow: var(--glow-cyan);
}

.btn-sm {
    font-size: 0.75rem;
    padding: 8px 16px;
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    background: transparent;
    border-radius: var(--border-radius);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-sm:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    box-shadow: var(--glow-cyan);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

/* Social icons */
.hero-socials {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 48px;
}
.social-icon {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(0, 245, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition-normal);
}
.social-icon:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
    transform: translateY(-3px);
}
.social-icon[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -32px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--accent-cyan);
    background: var(--bg-surface);
    padding: 4px 10px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}
.social-icon[data-tooltip]:hover::after {
    opacity: 1;
}

/* Scroll indicator */
.scroll-indicator {
    animation: bounce 2s ease infinite;
    color: var(--accent-cyan);
    font-size: 1.2rem;
    opacity: 0.5;
}
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* ===== SECTION HEADINGS ===== */
.section-heading {
    font-family: var(--font-heading);
    font-size: clamp(1.3rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--accent-cyan);
    text-align: center;
    margin-bottom: 60px;
    letter-spacing: 2px;
    position: relative;
}
.heading-prompt {
    color: var(--accent-green);
}

/* Glitch on section headings */
.glitch-heading {
    position: relative;
}
.glitch-heading::before,
.glitch-heading::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    pointer-events: none;
}
.glitch-heading.glitching::before {
    animation: glitch-heading-1 0.5s ease forwards;
    color: var(--accent-red);
}
.glitch-heading.glitching::after {
    animation: glitch-heading-2 0.5s ease forwards;
    color: var(--accent-cyan);
}

@keyframes glitch-heading-1 {
    0% { opacity: 0.7; transform: translate(-2px, -1px); }
    33% { opacity: 0.5; transform: translate(2px, 1px); }
    66% { opacity: 0.3; transform: translate(-1px, 1px); }
    100% { opacity: 0; transform: translate(0); }
}
@keyframes glitch-heading-2 {
    0% { opacity: 0.7; transform: translate(2px, 1px); }
    33% { opacity: 0.5; transform: translate(-2px, -1px); }
    66% { opacity: 0.3; transform: translate(1px, -1px); }
    100% { opacity: 0; transform: translate(0); }
}

/* ===== FADE-IN ANIMATION ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== ABOUT SECTION ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
    margin-bottom: 80px;
}

/* System Info Panel (Terminal Look) */
.system-info-panel {
    background: var(--bg-surface);
    border: 1px solid rgba(0, 245, 255, 0.15);
    border-radius: var(--border-radius);
    overflow: hidden;
}
.panel-header {
    background: rgba(0, 245, 255, 0.05);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(0, 245, 255, 0.1);
}
.panel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.panel-dot.red { background: #FF5F56; }
.panel-dot.yellow { background: #FFBD2E; }
.panel-dot.green { background: #27C93F; }
.panel-title {
    margin-left: 8px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.panel-body {
    padding: 20px;
}
.info-line {
    font-size: 0.88rem;
    margin-bottom: 8px;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}
.info-line.visible {
    opacity: 1;
    transform: translateX(0);
}
.info-key {
    color: var(--accent-cyan);
    font-weight: 600;
    display: inline-block;
    min-width: 100px;
}
.info-sep {
    color: var(--text-secondary);
    margin: 0 4px;
}
.info-value {
    color: var(--text-primary);
}

/* About Bio */
.about-bio {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.9;
}
.about-bio p {
    margin-bottom: 16px;
}
.bio-highlight {
    color: var(--accent-cyan);
    font-weight: 600;
    border-left: 3px solid var(--accent-cyan);
    padding-left: 16px;
}

/* ===== EDUCATION TIMELINE ===== */
.timeline {
    max-width: 700px;
    margin: 0 auto;
}
.timeline-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    color: var(--accent-cyan);
    text-align: center;
    margin-bottom: 40px;
    letter-spacing: 2px;
}
.timeline-title i {
    margin-right: 8px;
}
.timeline-track {
    position: relative;
    padding-left: 40px;
}
.timeline-track::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-green), transparent);
    box-shadow: 0 0 8px rgba(0, 245, 255, 0.3);
}
.timeline-item {
    position: relative;
    margin-bottom: 32px;
}
.timeline-dot {
    position: absolute;
    left: -34px;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-cyan);
    box-shadow: 0 0 12px rgba(0, 245, 255, 0.5);
    border: 2px solid var(--bg-primary);
}
.timeline-card {
    background: var(--bg-surface);
    padding: 20px 24px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 245, 255, 0.1);
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}
.timeline-card:hover {
    border-color: rgba(0, 245, 255, 0.3);
    box-shadow: 0 0 20px rgba(0, 245, 255, 0.05);
}
.timeline-date {
    font-size: 0.75rem;
    color: var(--accent-green);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.timeline-card h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-heading);
    margin: 6px 0 4px;
    letter-spacing: 1px;
}
.timeline-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.skill-card {
    background: var(--bg-surface);
    border: 1px solid rgba(0, 245, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 28px;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}
.skill-card[data-accent="cyan"]::before { background: var(--accent-cyan); box-shadow: 0 0 12px var(--accent-cyan); }
.skill-card[data-accent="green"]::before { background: var(--accent-green); box-shadow: 0 0 12px var(--accent-green); }
.skill-card[data-accent="orange"]::before { background: var(--accent-orange); box-shadow: 0 0 12px var(--accent-orange); }
.skill-card[data-accent="purple"]::before { background: var(--accent-purple); box-shadow: 0 0 12px var(--accent-purple); }

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.skill-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}
.skill-card-header i {
    font-size: 1.3rem;
    color: var(--accent-cyan);
}
.skill-card[data-accent="green"] .skill-card-header i { color: var(--accent-green); }
.skill-card[data-accent="orange"] .skill-card-header i { color: var(--accent-orange); }
.skill-card[data-accent="purple"] .skill-card-header i { color: var(--accent-purple); }

.skill-card-header h3 {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--text-heading);
    letter-spacing: 1px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.skill-tag {
    font-size: 0.75rem;
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(0, 245, 255, 0.08);
    border: 1px solid rgba(0, 245, 255, 0.2);
    color: var(--accent-cyan);
    transition: all var(--transition-normal);
    white-space: nowrap;
}
.skill-card[data-accent="green"] .skill-tag {
    background: rgba(0, 255, 136, 0.08);
    border-color: rgba(0, 255, 136, 0.2);
    color: var(--accent-green);
}
.skill-card[data-accent="orange"] .skill-tag {
    background: rgba(255, 107, 53, 0.08);
    border-color: rgba(255, 107, 53, 0.2);
    color: var(--accent-orange);
}
.skill-card[data-accent="purple"] .skill-tag {
    background: rgba(168, 85, 247, 0.08);
    border-color: rgba(168, 85, 247, 0.2);
    color: var(--accent-purple);
}

.skill-tag:hover {
    transform: scale(1.08);
    box-shadow: 0 0 12px rgba(0, 245, 255, 0.25);
}
.skill-card[data-accent="green"] .skill-tag:hover {
    box-shadow: 0 0 12px rgba(0, 255, 136, 0.25);
}
.skill-card[data-accent="orange"] .skill-tag:hover {
    box-shadow: 0 0 12px rgba(255, 107, 53, 0.25);
}
.skill-card[data-accent="purple"] .skill-tag:hover {
    box-shadow: 0 0 12px rgba(168, 85, 247, 0.25);
}

/* ===== PROJECTS SECTION ===== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid rgba(0, 245, 255, 0.1);
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.project-card:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.card-accent-border {
    height: 3px;
    width: 100%;
}
.project-card[data-accent="cyan"] .card-accent-border { background: var(--accent-cyan); box-shadow: 0 0 12px var(--accent-cyan); }
.project-card[data-accent="green"] .card-accent-border { background: var(--accent-green); box-shadow: 0 0 12px var(--accent-green); }
.project-card[data-accent="orange"] .card-accent-border { background: var(--accent-orange); box-shadow: 0 0 12px var(--accent-orange); }

.card-watermark {
    position: absolute;
    bottom: 10px;
    right: 16px;
    font-size: 5rem;
    opacity: 0.04;
    color: var(--text-primary);
    pointer-events: none;
    z-index: 0;
}

.project-card-body {
    padding: 28px;
    position: relative;
    z-index: 1;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-heading);
    letter-spacing: 1px;
    margin-bottom: 12px;
}
.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}
.meta-tag {
    font-size: 0.72rem;
    color: var(--text-secondary);
    background: rgba(0, 245, 255, 0.05);
    padding: 4px 10px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.meta-tag i { color: var(--accent-cyan); font-size: 0.65rem; }

.project-summary p {
    font-size: 0.88rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.project-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, opacity 0.4s ease;
    opacity: 0;
}
.project-card.card--expanded .project-details {
    max-height: 500px;
    opacity: 1;
}
.project-details ul {
    list-style: none;
    padding: 0;
    margin-bottom: 12px;
}
.project-details li {
    font-size: 0.82rem;
    color: var(--text-secondary);
    padding: 4px 0 4px 18px;
    position: relative;
}
.project-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-green);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}
.project-tag {
    font-size: 0.68rem;
    padding: 4px 10px;
    border-radius: 12px;
    background: rgba(0, 255, 136, 0.08);
    border: 1px solid rgba(0, 255, 136, 0.2);
    color: var(--accent-green);
}

.btn-expand {
    background: none;
    border: 1px solid rgba(0, 245, 255, 0.3);
    color: var(--accent-cyan);
    font-family: var(--font-body);
    font-size: 0.75rem;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-normal);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.btn-expand:hover {
    background: rgba(0, 245, 255, 0.1);
    border-color: var(--accent-cyan);
}
.expand-icon {
    transition: transform var(--transition-normal);
}
.project-card.card--expanded .expand-icon {
    transform: rotate(180deg);
}
.project-card.card--expanded .expand-text::after {
    content: '';
}

/* ===== CERTIFICATIONS SECTION ===== */
.cert-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.filter-btn {
    font-family: var(--font-body);
    font-size: 0.8rem;
    padding: 10px 24px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 245, 255, 0.3);
    background: transparent;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-normal);
}
.filter-btn:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}
.filter-btn.active {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.cert-card {
    background: var(--bg-surface);
    border: 1px solid rgba(0, 245, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 10px;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), opacity 0.4s ease;
}
.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    border-color: rgba(0, 245, 255, 0.3);
}
.cert-card.hidden {
    display: none;
}

.cert-icon {
    font-size: 2rem;
    color: var(--accent-cyan);
    margin-bottom: 4px;
}
.cert-card[data-filter="security"] .cert-icon {
    color: var(--accent-orange);
}

.cert-name {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--text-heading);
    letter-spacing: 0.5px;
    line-height: 1.4;
}

.cert-issuer {
    font-size: 0.72rem;
    padding: 3px 12px;
    border-radius: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.issuer-datacamp {
    background: rgba(0, 245, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 245, 255, 0.2);
}
.issuer-security {
    background: rgba(255, 107, 53, 0.1);
    color: var(--accent-orange);
    border: 1px solid rgba(255, 107, 53, 0.2);
}

.cert-date {
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.cert-verified {
    font-size: 0.72rem;
    color: var(--accent-green);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ===== CONTACT SECTION ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.contact-card {
    background: var(--bg-surface);
    border: 1px solid rgba(0, 245, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 28px 20px;
    text-align: center;
    position: relative;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}
.contact-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 245, 255, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.contact-icon {
    font-size: 1.8rem;
    color: var(--accent-cyan);
    margin-bottom: 12px;
    filter: drop-shadow(0 0 10px rgba(0, 245, 255, 0.4));
}

.contact-card h4 {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--text-heading);
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.contact-info {
    font-size: 0.78rem;
    color: var(--text-secondary);
    word-break: break-all;
    display: block;
    margin-bottom: 8px;
}

.copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 6px;
    transition: color var(--transition-fast);
    position: relative;
}
.copy-btn:hover {
    color: var(--accent-cyan);
}
.copy-tooltip {
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.68rem;
    color: var(--accent-green);
    background: var(--bg-surface);
    padding: 3px 10px;
    border-radius: 4px;
    border: 1px solid rgba(0, 255, 136, 0.2);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}
.copy-btn.copied .copy-tooltip {
    opacity: 1;
}

/* Contact Social Buttons */
.contact-socials {
    display: flex;
    justify-content: center;
    gap: 20px;
}
.social-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid rgba(0, 245, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-size: 1.4rem;
    transition: all var(--transition-normal);
}
.social-btn:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    box-shadow: var(--glow-cyan);
    transform: translateY(-4px) scale(1.05);
    border-color: var(--accent-cyan);
}

/* ===== FOOTER ===== */
#footer {
    padding: 28px 0;
    border-top: 1px solid rgba(0, 245, 255, 0.15);
    position: relative;
    z-index: 1;
}
.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-left p {
    font-size: 0.78rem;
    color: var(--text-secondary);
}
.footer-center {
    display: flex;
    gap: 20px;
}
.footer-center a {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color var(--transition-fast);
}
.footer-center a:hover {
    color: var(--accent-cyan);
}
.footer-right p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--accent-cyan);
    color: var(--bg-primary);
    border: none;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--glow-cyan);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 30px rgba(0, 245, 255, 0.5);
}

/* ===== RESPONSIVE BREAKPOINTS ===== */

/* 1024px and below */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    .skills-grid {
        grid-template-columns: 1fr 1fr;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 768px and below */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .section {
        padding: 70px 0;
    }
    .section-heading {
        margin-bottom: 40px;
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
    .cert-grid {
        grid-template-columns: 1fr 1fr;
    }
    .hero-name {
        letter-spacing: 2px;
    }
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}

/* 480px and below */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    .btn {
        width: 100%;
        justify-content: center;
        max-width: 280px;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .cert-grid {
        grid-template-columns: 1fr;
    }
    .boot-sequence {
        font-size: 0.78rem;
    }
    .timeline-track {
        padding-left: 30px;
    }
    .timeline-track::before {
        left: 8px;
    }
    .timeline-dot {
        left: -27px;
        width: 10px;
        height: 10px;
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 38px;
        height: 38px;
    }
}