/* ============================================================
   REUSABLE COMPONENTS
   ============================================================ */

/* --- BUTTONS --- */
.btn-primary,
.btn-secondary,
.resume-btn,
.classroom-card-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    font-size: .88rem;
    transition: transform var(--motion-fast) ease, box-shadow var(--motion-medium) ease, border-color var(--motion-medium) ease, background var(--motion-medium) ease, color var(--motion-medium) ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--grad);
    color: #fff;
    box-shadow: 0 10px 28px color-mix(in srgb, var(--glow) 48%, transparent);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 36px color-mix(in srgb, var(--glow) 62%, transparent);
}

.btn-secondary {
    background: var(--surface-elev);
    border: 1px solid var(--card-border);
    color: var(--text);
}

.btn-secondary:hover {
    border-color: var(--accent-border-soft);
    background: var(--surface-strong);
}

.resume-btn {
    padding: 8px 18px;
    background: var(--grad);
    color: #fff;
    box-shadow: 0 10px 24px color-mix(in srgb, var(--glow) 42%, transparent);
}

/* --- THEME SWITCHER (dropdown) --- */
.theme-switcher {
    position: relative;
}

.theme-switcher-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 9px;
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.theme-switcher-trigger:hover {
    border-color: var(--accent);
    background: var(--bg2);
}

.theme-switcher-trigger:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

.theme-switcher-chevron {
    font-size: 0.7rem;
    opacity: 0.8;
    transition: transform 0.2s ease;
}

.theme-switcher-trigger[aria-expanded="true"] .theme-switcher-chevron {
    transform: rotate(180deg);
}

.theme-switcher-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 120px;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow-hover);
    padding: 6px;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.theme-switcher-dropdown[hidden] {
    display: none !important;
}

.theme-option {
    padding: 10px 14px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.theme-option:hover {
    background: var(--bg2);
}

.theme-option[aria-current="true"],
.theme-option.active {
    background: var(--accent-soft);
    color: var(--accent);
}

.theme-option:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

/* --- CARDS --- */
.card,
.expertise-card,
.education-card,
.project-card,
.highlight-item,
.cert-card,
.award-item {
    background: var(--surface-elev);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 28px;
    transition: transform var(--motion-fast) ease, box-shadow var(--motion-medium) ease, border-color var(--motion-medium) ease, background var(--motion-medium) ease;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

/* T2-C: Mouse-tracking spotlight on cards */
.project-card::after,
.expertise-card::after,
.education-card::after,
.cert-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(
        300px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        color-mix(in srgb, var(--accent) 10%, transparent),
        transparent 70%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 0;
}

.project-card:hover::after,
.expertise-card:hover::after,
.education-card:hover::after,
.cert-card:hover::after {
    opacity: 1;
}

.project-card {
    border-radius: var(--radius-lg);
    padding: 32px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-card::before {
    content: "";
    position: absolute;
    inset: -40% -10% auto;
    height: 70%;
    background: radial-gradient(circle at center, color-mix(in srgb, var(--accent) 24%, transparent), transparent 72%);
    opacity: 0;
    transform: translateY(-18px);
    transition: opacity var(--motion-medium) ease, transform var(--motion-medium) ease;
    pointer-events: none;
}

.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover), 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent) inset;
}

.project-card:hover::before {
    opacity: 0.65;
    transform: translateY(0);
}

/* T2-A: Card magnetic translate via CSS custom properties */
.project-card,
.expertise-card,
.highlight-item {
    transform: translate(calc(var(--mag-x, 0) + var(--fade-x, 0px)), calc(var(--mag-y, 0) + var(--fade-y, 0px)));
}

/* --- IMAGES & WRAPPERS --- */
.project-image-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg3);
}

.project-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.project-image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 200px;
    font-size: 3.5rem;
    background: var(--bg3);
}

/* --- MODALS --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--overlay-bg);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--surface-elev);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    border: 1px solid var(--card-border);
    padding: 40px;
    color: var(--text);
    overflow-y: auto;
}

/* --- GLASS THEME: frosted panels --- */
body.glass-theme .card,
body.glass-theme .expertise-card,
body.glass-theme .education-card,
body.glass-theme .project-card,
body.glass-theme .highlight-item,
body.glass-theme .cert-card,
body.glass-theme .award-item {
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
}

body.glass-theme .modal-content {
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
}

/* --- TIMELINES --- */
.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
    display: flex;
    gap: 32px;
    padding-bottom: 48px;
    position: relative;
}

.timeline-dot {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--grad);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px var(--glow);
    z-index: 1;
    transform: scale(0);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.timeline-dot.visible {
    transform: scale(1);
}

/* --- TOAST NOTIFICATIONS --- */
.toast-container {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    background: var(--surface-elev);
    border: 1px solid var(--accent);
    color: var(--text);
    padding: 12px 24px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    animation: toastIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1) forwards;
    pointer-events: auto;
}

.toast.hiding {
    animation: toastOut 0.4s ease forwards;
}

.toast-icon {
    color: var(--accent);
    font-size: 1.2rem;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateY(-20px) scale(0.9);
    }
}

/* --- OTHER COMPONENTS --- */
.skeleton {
    position: relative;
    overflow: hidden;
    background-color: var(--card-border);
}

.skeleton::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background-image: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    animation: shimmer 2.5s infinite;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--grad);
    color: #fff;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 12px 26px color-mix(in srgb, var(--bg) 70%, transparent);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.hacker-scanline {
    position: fixed;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(220, 20, 60, 0.05) 50%);
    background-size: 100% 4px;
    z-index: 9998;
    pointer-events: none;
    display: none;
    animation: scanline 10s linear infinite;
    opacity: var(--scanline-opacity);
}

/* Professional/Hacker contrast balancing */
body.hacker-theme .section-label,
body.hacker-theme .project-tag {
    letter-spacing: 0.08em;
}

body.hacker-theme .section-label,
body.hacker-theme .project-tag,
body.hacker-theme .hero-role-chip,
body.hacker-theme .stack-chip {
    font-family: var(--font-mono);
}

/* --- HACKER THEME: RED INTERACTIVE GRAPHICS --- */

/* Animated red grid overlay on body */
body.hacker-theme::after {
    background:
        linear-gradient(var(--hacker-grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--hacker-grid-color) 1px, transparent 1px),
        radial-gradient(60vw 60vw at 95% -10%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 60%),
        radial-gradient(55vw 55vw at -10% 105%, color-mix(in srgb, var(--accent2) 8%, transparent), transparent 64%);
    background-size: 40px 40px, 40px 40px, 100% 100%, 100% 100%;
    animation: hacker-grid-drift 8s linear infinite;
    opacity: 0.7;
}

/* Moving bright red sweep line */
body.hacker-theme .hacker-scanline::after {
    content: '';
    position: fixed;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 26, 26, 0.6) 20%, rgba(255, 80, 80, 1) 50%, rgba(255, 26, 26, 0.6) 80%, transparent 100%);
    box-shadow: 0 0 18px 4px rgba(255, 26, 26, 0.5);
    animation: hacker-scanline-drift 5s linear infinite;
    pointer-events: none;
}

body.hacker-theme .hacker-scanline {
    display: block;
}

/* Card glows ΓÇö pulsing red border */
body.hacker-theme .project-card,
body.hacker-theme .expertise-card,
body.hacker-theme .highlight-item {
    box-shadow:
        0 0 0 1px rgba(255, 26, 26, 0.22),
        0 0 22px rgba(255, 26, 26, 0.12);
    animation: hacker-border-flare 3s ease-in-out infinite;
}

body.hacker-theme .project-card:hover,
body.hacker-theme .expertise-card:hover,
body.hacker-theme .highlight-item:hover {
    box-shadow:
        0 0 0 1px rgba(255, 26, 26, 0.6),
        0 0 30px rgba(255, 26, 26, 0.3),
        0 0 60px rgba(255, 26, 26, 0.12);
    animation: none;
    transform: translateY(-6px);
}

/* Buttons ΓÇö red neon glow with flicker */
body.hacker-theme .btn-primary,
body.hacker-theme .resume-btn {
    text-shadow: 0 0 8px rgba(255, 26, 26, 0.6), 0 0 20px rgba(255, 26, 26, 0.3);
    box-shadow: 0 0 14px rgba(255, 26, 26, 0.35), inset 0 0 12px rgba(255, 26, 26, 0.08);
    animation: hacker-red-pulse 2.8s ease-in-out infinite;
}

body.hacker-theme .btn-secondary {
    border-color: rgba(255, 26, 26, 0.5);
    color: var(--accent);
    text-shadow: 0 0 6px rgba(255, 26, 26, 0.4);
}

/* Chips */
body.hacker-theme .hero-role-chip,
body.hacker-theme .stack-chip {
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    border-color: rgba(255, 26, 26, 0.38);
    text-shadow: 0 0 5px rgba(255, 26, 26, 0.35);
}

/* Hero name ΓÇö glitch effect */
body.hacker-theme .hero-name {
    animation: hacker-text-flicker 8s step-start infinite;
    text-shadow: 0 0 12px var(--glow), 0 0 30px rgba(255, 26, 26, 0.3);
    position: relative;
}

body.hacker-theme .hero-name::before,
body.hacker-theme .hero-name::after {
    content: attr(data-text);
    position: absolute;
    inset: 0;
    color: var(--accent);
    font: inherit;
}

body.hacker-theme .hero-name::before {
    left: -2px;
    text-shadow: 3px 0 rgba(255, 26, 26, 0.7);
    animation: hacker-glitch 9s infinite linear alternate-reverse;
}

body.hacker-theme .hero-name::after {
    left: 2px;
    text-shadow: -3px 0 rgba(255, 100, 100, 0.5);
    animation: hacker-glitch 6s infinite linear alternate;
}

/* Section titles ΓÇö red glow */
body.hacker-theme .section-title {
    text-shadow: 0 0 14px rgba(255, 26, 26, 0.25);
    animation: hacker-text-flicker 12s step-start infinite;
}

body.hacker-theme .section-title span {
    text-shadow: 0 0 18px var(--glow), 0 0 40px rgba(255, 26, 26, 0.3);
}

/* Logo ΓÇö flicker */
body.hacker-theme .logo {
    text-shadow: 0 0 10px var(--glow);
    animation: hacker-text-flicker 7s step-start infinite;
}

/* Timeline dot ΓÇö red pulse */
body.hacker-theme .timeline-dot {
    animation: hacker-red-pulse 2s ease-in-out infinite;
}

/* Highlight numbers ΓÇö red glow */
body.hacker-theme .highlight-num {
    text-shadow: 0 0 16px var(--glow), 0 0 40px rgba(255, 26, 26, 0.25);
}

/* Scroll progress bar ΓÇö red */
body.hacker-theme .scroll-progress-bar {
    background: linear-gradient(90deg, #8b0000, #ff1a1a, #ff6666);
    box-shadow: 0 0 8px rgba(255, 26, 26, 0.6);
}

/* Cursor dot/outline ΓÇö red in hacker mode */
body.hacker-theme .cursor-dot {
    background: #ff1a1a;
    box-shadow: 0 0 8px rgba(255, 26, 26, 0.9), 0 0 16px rgba(255, 26, 26, 0.5);
}

body.hacker-theme .cursor-outline {
    border-color: rgba(255, 26, 26, 0.7);
    box-shadow: 0 0 10px rgba(255, 26, 26, 0.3);
}

/* Input/focus highlight ΓÇö red */
body.hacker-theme a:focus-visible,
body.hacker-theme button:focus-visible,
body.hacker-theme .project-card:focus-visible {
    outline-color: rgba(255, 26, 26, 0.8);
    box-shadow: 0 0 0 3px rgba(255, 26, 26, 0.25);
}

/* Hero orbs ΓÇö red glow */
body.hacker-theme .hero-orb {
    filter: hue-rotate(220deg) saturate(2.5) brightness(1.2);
}

/* Header ΓÇö red accent border */
body.hacker-theme #header.scrolled {
    border-bottom-color: rgba(255, 26, 26, 0.3);
    box-shadow: 0 4px 24px rgba(255, 26, 26, 0.12);
}

/* Modal ΓÇö red glow */
body.hacker-theme .modal-content {
    box-shadow: 0 0 0 1px rgba(255, 26, 26, 0.3), 0 24px 64px rgba(255, 26, 26, 0.18);
}

/* Text description muted ΓÇö reddish dark, not greenish */
body.hacker-theme .hero-desc,
body.hacker-theme .project-summary,
body.hacker-theme .expertise-desc {
    color: rgba(255, 102, 102, 0.82);
}

/* Back-to-top ΓÇö red pulse */
body.hacker-theme .back-to-top {
    animation: hacker-red-pulse 2.4s ease-in-out infinite;
}

/* Cert / award / education cards */
body.hacker-theme .cert-card,
body.hacker-theme .award-item,
body.hacker-theme .education-card {
    box-shadow:
        0 0 0 1px rgba(255, 26, 26, 0.18),
        0 0 18px rgba(255, 26, 26, 0.08);
    animation: hacker-border-flare 4s ease-in-out infinite;
}

/* Theme switcher active hacker pill */
body.hacker-theme .theme-option[aria-current="true"] {
    box-shadow: 0 0 10px rgba(255, 26, 26, 0.5);
}

/* --- TWEAKS AND ANIMATIONS --- */

/* T1-A: Hero image rotating glow ring */
.hero-image-container::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: calc(var(--radius-lg) + 4px);
    background: conic-gradient(
        from 0deg,
        transparent 0deg,
        color-mix(in srgb, var(--accent) 70%, transparent) 60deg,
        var(--accent) 120deg,
        color-mix(in srgb, var(--accent2) 80%, transparent) 180deg,
        transparent 240deg,
        transparent 360deg
    );
    animation: ring-spin 6s linear infinite;
    z-index: -1;
    opacity: 0.7;
}

.hero-image-container::after {
    content: '';
    position: absolute;
    inset: 2px;
    border-radius: var(--radius-lg);
    background: var(--bg);
    z-index: -1;
}

@media (prefers-reduced-motion: reduce) {
    .hero-image-container::before {
        animation: none;
        background: var(--grad);
        opacity: 0.4;
    }
}

/* T2-B: Ripple burst on buttons */
.btn-primary,
.btn-secondary,
.resume-btn,
.classroom-card-btn,
.tab-btn {
    overflow: hidden;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    pointer-events: none;
    animation: ripple-burst 0.5s ease-out forwards;
}

/* T5-A: Expertise / section icons float */
.expertise-icon {
    font-size: 2.2rem;
    margin-bottom: 14px;
    display: inline-block;
    animation: icon-float 3s ease-in-out infinite;
}

.expertise-card:nth-child(2) .expertise-icon {
    animation-delay: 0.5s;
}

.expertise-card:nth-child(3) .expertise-icon {
    animation-delay: 1s;
}

.expertise-card:nth-child(4) .expertise-icon {
    animation-delay: 1.5s;
}

/* T5-C: Shimmer sweep on cert and award cards */
.cert-card::before,
.award-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        110deg,
        transparent 30%,
        rgba(255, 255, 255, 0.1) 50%,
        transparent 70%
    );
    background-size: 200% 100%;
    background-position: -200% center;
    transition: background-position 0.6s ease;
    pointer-events: none;
    z-index: 1;
}

.cert-card:hover::before,
.award-item:hover::before {
    background-position: 200% center;
}

/* T5-F: Hero CTA buttons one-time load shimmer */
.hero-content.visible .btn-primary {
    background-size: 200% 100%;
    background-image: linear-gradient(
        110deg,
        var(--grad) 30%,
        rgba(255, 255, 255, 0.25) 50%,
        var(--grad) 70%
    );
    animation: btn-load-shimmer 0.9s ease 1.2s forwards;
    background-position: -200% center;
}

/* T5-D: Marquee pause on hover + hacker speed */
.marquee-content {
    display: flex;
    gap: 48px;
    white-space: nowrap;
    animation: marquee-scroll 30s linear infinite;
}

.marquee-content:hover {
    animation-play-state: paused;
}

@keyframes marquee-scroll {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(-50%);
    }
}

body.hacker-theme .marquee-content {
    animation-duration: 12s;
}

/* T4-E: Mobile animation budget reduction */
body.reduce-motion-mobile .project-card,
body.reduce-motion-mobile .expertise-card,
body.reduce-motion-mobile .highlight-item,
body.reduce-motion-mobile .cert-card,
body.reduce-motion-mobile .award-item,
body.reduce-motion-mobile .education-card {
    animation: none;
}

body.reduce-motion-mobile .expertise-icon {
    animation: none;
}

body.reduce-motion-mobile .hero-image-container::before {
    animation: none;
}

body.reduce-motion-mobile .orbit-chip {
    display: none;
}

@media (max-width: 900px) {
    .hero-ctas {
        justify-content: center;
    }

    .hero-desc {
        margin-inline: auto;
    }

    .footer-top,
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

.typewriter-caret {
    display: inline-block;
    color: var(--accent);
    font-weight: 400;
    margin-left: 2px;
    animation: caret-blink 1s step-start infinite;
}

.typewriter-text {
    display: inline;
}

@media (prefers-reduced-motion: reduce) {
    .typewriter-caret {
        animation: none;
    }

    .expertise-icon {
        animation: none;
    }
}

/* === SKILLS & TECH STACK SECTION === */
.section-skills .section-inner {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.skills-block {
    background: var(--surface-elev);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 24px 28px;
    transition: border-color var(--motion-medium) ease, box-shadow var(--motion-medium) ease;
}

.skills-block:hover {
    border-color: var(--accent-border-soft);
    box-shadow: 0 8px 32px color-mix(in srgb, var(--glow) 18%, transparent);
}

.skills-category {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--accent);
    margin-bottom: 14px;
}

.skills-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

@media (max-width: 600px) {
    .skills-block {
        padding: 18px 16px;
    }

    .skills-category {
        font-size: 0.78rem;
    }
}

body.hacker-theme .skills-block {
    border-color: var(--accent);
    background: rgba(0, 255, 65, 0.03);
}

body.hacker-theme .skills-block:hover {
    background: rgba(0, 255, 65, 0.07);
    box-shadow: 0 0 24px color-mix(in srgb, var(--accent) 20%, transparent);
}

body.glass-theme .skills-block {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
}


/* =============================================================
   ENHANCED ANIMATIONS AND UI EFFECTS
   ============================================================= */

/* Expertise card: glow border on hover */
.expertise-card:hover {
    border-color: var(--accent);
    box-shadow: 0 18px 44px color-mix(in srgb, var(--glow) 28%, transparent),
                0 0 0 1px color-mix(in srgb, var(--accent) 30%, transparent) inset;
}

/* Staggered card entry: alternating slide directions */
.projects-grid .fade-up:nth-child(odd) {
    --fade-x: -12px;
}

.projects-grid .fade-up:nth-child(even) {
    --fade-x: 12px;
}

/* Skill chip: pop and glow on hover */
.stack-chip {
    transition: transform 0.18s cubic-bezier(0.34, 1.56, 0.64, 1),
                background 0.18s ease,
                box-shadow 0.18s ease,
                color 0.18s ease;
    cursor: default;
}

.stack-chip:hover {
    transform: translateY(-3px) scale(1.06);
    background: color-mix(in srgb, var(--accent) 22%, transparent);
    color: var(--accent);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--glow) 35%, transparent);
}

/* --- FOOTER & PRE-FOOTER --- */

/* Pre-footer CTA */
.pre-footer-cta {
    padding: 100px 0 60px;
    background: radial-gradient(circle at 70% 30%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 50%);
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    background: var(--surface-elev);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 60px 40px;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 5%, transparent), transparent);
    pointer-events: none;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.1;
}

.cta-title span {
    background: var(--grad);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 600px;
    margin-inline: auto;
}

/* Footer Main */
.footer {
    padding: 80px 0 40px;
    background: var(--bg);
    border-top: 1px solid var(--card-border);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    opacity: 0.3;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-heading {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    margin-bottom: 8px;
}

.footer-tagline {
    font-weight: 600;
    color: var(--text);
    font-size: 1rem;
}

.footer-bio {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.footer-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 5px;
}

.badge-pill {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 12px;
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color 0.2s ease, transform 0.2s ease;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--accent);
    transform: translateX(5px);
}

/* Social Icons in Footer */
.social-links-grid {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.social-links-grid a {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-elev);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text-muted);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.social-links-grid a:hover {
    background: var(--accent-soft);
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px color-mix(in srgb, var(--accent) 15%, transparent);
}

.footer-email-link {
    margin-top: 10px;
    font-weight: 500;
}

.footer-email-link a {
    color: var(--text);
    word-break: break-all;
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--card-border);
    font-size: 0.85rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 20px;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a:hover {
    color: var(--accent);
}

.ai-heart {
    color: #ff4d4d;
    display: inline-block;
    animation: pulse-heart 2s infinite ease-in-out;
}

@keyframes pulse-heart {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* Responsive Footer */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
    
    .footer-brand-col {
        grid-column: span 2;
    }
}

@media (max-width: 600px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-brand-col {
        grid-column: span 1;
    }
    
    .cta-content {
        padding: 40px 20px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* Theme specifics for Footer */
body.glass-theme .footer {
    background: rgba(var(--bg-rgb), 0.7);
    backdrop-filter: blur(20px);
}

body.hacker-theme .footer-heading {
    font-family: var(--font-mono);
}

body.hacker-theme .badge-pill {
    font-family: var(--font-mono);
}

/* Project card: bottom accent bar on hover */
.project-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--grad);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
    z-index: 2;
}

.project-card:hover::after {
    transform: scaleX(1);
}

/* Hero role chips: hover lift */
.hero-role-chip {
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.2s ease;
}

.hero-role-chip:hover {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 6px 18px color-mix(in srgb, var(--glow) 32%, transparent);
}

/* Comp table: animated row highlight */
.comp-table tbody tr {
    transition: background 0.18s ease, transform 0.18s ease;
}

.comp-table tbody tr:hover {
    background: color-mix(in srgb, var(--accent) 6%, transparent);
    transform: translateX(3px);
}

/* Back to top: pulse ring */
@keyframes ring-expand {
    from {
        transform: scale(1);
        opacity: 0.45;
    }
    to {
        transform: scale(1.9);
        opacity: 0;
    }
}

.back-to-top::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: var(--grad);
    opacity: 0;
    pointer-events: none;
}

.back-to-top.visible::before {
    animation: ring-expand 1.8s ease-out infinite;
}

/* Glass theme: enhanced blur panels */
body.glass-theme .expertise-card,
body.glass-theme .project-card,
body.glass-theme .highlight-item {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border-color: rgba(255, 255, 255, 0.14);
}

/* Reduce motion: disable new animations */
@media (prefers-reduced-motion: reduce) {
    .hero-content {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .hero-visual {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .tab-pane.active {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .back-to-top::before {
        animation: none;
    }

    .projects-grid .fade-up:nth-child(odd),
    .projects-grid .fade-up:nth-child(even) {
        transform: translateY(32px);
    }
}