/* ============================================================
   PORTFOLIO – ROMAIN
   Design system : light mode, navy + amber
   ============================================================ */

/* ── CUSTOM PROPERTIES ──────────────────────────────────────── */
:root {
    /* Palette */
    --clr-accent-1: #1b3a5c;
    --clr-accent-2: #b8791a;
    --clr-accent-gradient: linear-gradient(135deg, #1b3a5c 0%, #2d6099 100%);

    /* Surfaces */
    --clr-bg: #ffffff;
    --clr-bg-alt: #f4f6f9;
    --clr-bg-dark: #0d1e30;
    --clr-card: #ffffff;

    /* Text */
    --clr-text: #1a2535;
    --clr-text-secondary: #4a5568;
    --clr-text-muted: #718096;

    /* Borders & shadows */
    --clr-border: #e2e6ed;
    --shadow-xs: 0 1px 4px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.12);
    --shadow-accent: 0 8px 32px rgba(27, 58, 92, 0.30);

    /* Shapes */
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 24px;
    --radius-pill: 999px;

    /* Typography */
    --font-body: 'Inter', system-ui, sans-serif;
    --font-display: 'Space Grotesk', system-ui, sans-serif;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 2rem;
    --fs-4xl: 2.75rem;
    --fs-5xl: 3.75rem;
    --lh-tight: 1.2;
    --lh-snug: 1.4;
    --lh-normal: 1.7;

    /* Layout */
    --container-max: 1100px;
    --section-pad: 6rem;
    --nav-h: 68px;

    /* Transitions */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --dur: 0.3s;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    color: var(--clr-text);
    background: var(--clr-bg);
    line-height: var(--lh-normal);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── UTILITIES ──────────────────────────────────────────────── */
.container {
    width: min(var(--container-max), 100% - 3rem);
    margin-inline: auto;
}

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

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: var(--fs-base);
    transition: all var(--dur) var(--ease);
    white-space: nowrap;
}

.btn-primary {
    background: var(--clr-accent-gradient);
    color: #fff;
    box-shadow: var(--shadow-accent);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(27, 58, 92, 0.45);
}

.btn-outline {
    border: 2px solid rgba(255, 255, 255, 0.35);
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(6px);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.6);
    transform: translateY(-2px);
}

.btn-large { padding: 0.95rem 2.25rem; font-size: var(--fs-lg); }

/* ── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 1000;
    transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    width: min(var(--container-max), 100% - 3rem);
    margin-inline: auto;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    transition: color var(--dur) var(--ease);
}
.navbar.scrolled .nav-logo { color: var(--clr-text); }
.nav-logo .dot { color: var(--clr-accent-2); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.85);
    letter-spacing: 0.02em;
    transition: color var(--dur) var(--ease);
}
.navbar.scrolled .nav-links a { color: var(--clr-text-secondary); }
.nav-links a:hover { color: var(--clr-accent-1); }

.nav-links .nav-cta {
    background: var(--clr-accent-gradient);
    color: #fff !important;
    padding: 0.45rem 1.2rem;
    border-radius: var(--radius-pill);
    font-weight: 600;
}
.nav-links .nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all var(--dur) var(--ease);
}
.navbar.scrolled .nav-toggle span { background: var(--clr-text); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── HERO ───────────────────────────────────────────────────── */
#hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    background: var(--clr-bg-dark);
    overflow: hidden;
    padding: calc(var(--nav-h) + 2rem) 1.5rem 4rem;
    gap: 3rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* Subtle grid overlay */
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(45, 96, 153, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(45, 96, 153, 0.08) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}
#hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(45, 96, 153, 0.28) 0%, transparent 70%);
    pointer-events: none;
}
#hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(184, 121, 26, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 560px;
    flex: 1 1 300px;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-size: var(--fs-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.65);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
}

#hero h1 {
    font-family: var(--font-display);
    font-size: clamp(var(--fs-4xl), 8vw, var(--fs-5xl));
    font-weight: 700;
    color: #fff;
    line-height: var(--lh-tight);
    margin-bottom: 0.35rem;
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: clamp(var(--fs-2xl), 4vw, var(--fs-3xl));
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    line-height: var(--lh-snug);
    margin-bottom: 1.5rem;
}

.hero-description {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--fs-lg);
    line-height: var(--lh-normal);
    margin-bottom: 2rem;
    max-width: 480px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.55);
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-pill);
}

/* Profile card (hero visual) */
.hero-visual {
    position: relative;
    z-index: 1;
    flex: 1 1 280px;
    max-width: 400px;
}

.profile-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.profile-card-top {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.profile-initials {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--clr-accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.profile-card-title {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.profile-card-title > span:first-child {
    font-weight: 700;
    font-size: var(--fs-base);
    color: #fff;
}

.profile-card-sub {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.45);
}

.profile-avail {
    font-size: 0.72rem;
    font-weight: 700;
    background: rgba(74, 222, 128, 0.15);
    color: #4ade80;
    border: 1px solid rgba(74, 222, 128, 0.3);
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-pill);
    white-space: nowrap;
}

.profile-stats {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    gap: 0.2rem;
}

.stat-value {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--clr-accent-2);
}

.stat-label {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.profile-expertise {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.pe-label {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.35);
}

.pe-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.pe-tags span {
    font-size: 0.78rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.65);
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-pill);
}

/* Scroll hint */
.hero-scroll-hint {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    display: block;
    width: 8px; height: 8px;
    border-right: 2px solid rgba(255, 255, 255, 0.5);
    border-bottom: 2px solid rgba(255, 255, 255, 0.5);
    transform: rotate(45deg) translate(-1px, -1px);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50%       { transform: translateX(-50%) translateY(6px); }
}

/* ── PULSE DOT ──────────────────────────────────────────────── */
.pulse-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #4ade80;
    position: relative;
    flex-shrink: 0;
}
.pulse-dot::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background: rgba(74, 222, 128, 0.35);
    animation: pulse 2s infinite;
}
.pulse-dot.green { background: #4ade80; }

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50%       { transform: scale(1.8); opacity: 0; }
}

/* ── SECTIONS ───────────────────────────────────────────────── */
.section { padding: var(--section-pad) 0; }
.section-alt { background: var(--clr-bg-alt); }

.section-header {
    margin-bottom: 3.5rem;
}

.section-label {
    display: inline-block;
    font-size: var(--fs-sm);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--clr-accent-2);
    margin-bottom: 0.75rem;
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(var(--fs-3xl), 4vw, var(--fs-4xl));
    font-weight: 700;
    color: var(--clr-text);
    line-height: var(--lh-tight);
}

.section-subtitle {
    margin-top: 0.75rem;
    font-size: var(--fs-lg);
    color: var(--clr-text-secondary);
    max-width: 580px;
}

/* ── ABOUT ──────────────────────────────────────────────────── */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    color: var(--clr-text-secondary);
    margin-bottom: 1.25rem;
    font-size: var(--fs-lg);
}
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--clr-text); font-weight: 600; }

.about-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.info-card {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 1.1rem;
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.info-card:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.info-card-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    line-height: 1;
}

.info-card-body h4 {
    font-size: var(--fs-sm);
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--clr-text);
}

.info-card-body p {
    font-size: var(--fs-sm);
    color: var(--clr-text-secondary);
    line-height: 1.5;
}

.badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    background: var(--clr-accent-gradient);
    color: #fff;
    padding: 0.15rem 0.6rem;
    border-radius: var(--radius-pill);
    margin-top: 0.25rem;
}

.available {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: #16a34a;
    background: #dcfce7;
    padding: 0.15rem 0.6rem;
    border-radius: var(--radius-pill);
    margin-top: 0.25rem;
}

/* ── SKILLS ─────────────────────────────────────────────────── */
.skills-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.skills-block:first-child {
    grid-column: 1 / -1; /* Full width for technical skills */
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 4rem;
    row-gap: 0;
}

.skills-block:first-child .skills-block-title {
    grid-column: 1 / -1;
}

.skills-block-title {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--clr-text);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--clr-border);
}

.skill-item {
    margin-bottom: 1.25rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.4rem;
}

.skill-name {
    font-weight: 600;
    font-size: var(--fs-sm);
    color: var(--clr-text);
}

.skill-level {
    font-size: 0.78rem;
    color: var(--clr-text-muted);
}

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

.skill-fill {
    height: 100%;
    width: 0;
    background: var(--clr-accent-gradient);
    border-radius: var(--radius-pill);
    transition: width 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.tags-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--clr-accent-1);
    background: rgba(27, 58, 92, 0.07);
    border: 1px solid rgba(27, 58, 92, 0.18);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-pill);
    transition: all var(--dur) var(--ease);
}
.tag:hover {
    background: rgba(27, 58, 92, 0.14);
    border-color: var(--clr-accent-1);
}

.tag-tool {
    color: var(--clr-text-secondary);
    background: rgba(0, 0, 0, 0.04);
    border-color: var(--clr-border);
}
.tag-tool:hover {
    background: rgba(0, 0, 0, 0.07);
    border-color: var(--clr-text-muted);
}

/* ── TIMELINE ───────────────────────────────────────────────── */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.timeline-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0 1.75rem;
}

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.timeline-dot {
    width: 14px;
    height: 14px;
    background: var(--clr-accent-gradient);
    border-radius: 50%;
    border: 3px solid var(--clr-bg);
    box-shadow: 0 0 0 2px var(--clr-accent-1);
    flex-shrink: 0;
    margin-top: 0.35rem;
    position: relative;
    z-index: 1;
}

.timeline-line {
    width: 2px;
    flex: 1;
    background: var(--clr-border);
    margin-top: 6px;
    margin-bottom: -6px;
}

.timeline-body {
    padding-bottom: 3rem;
}

.timeline-date-badge {
    display: inline-block;
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--clr-accent-2);
    background: rgba(184, 121, 26, 0.09);
    border: 1px solid rgba(184, 121, 26, 0.25);
    padding: 0.25rem 0.8rem;
    border-radius: var(--radius-pill);
    margin-bottom: 1rem;
}

.timeline-card {
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.timeline-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.timeline-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.85rem;
}

.timeline-card-header h3 {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--clr-text);
    line-height: var(--lh-snug);
}

.timeline-company {
    display: block;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--clr-text-muted);
    margin-top: 0.2rem;
}

.duration-badge {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-pill);
    background: rgba(27, 58, 92, 0.09);
    color: var(--clr-accent-1);
    white-space: nowrap;
}
.duration-badge.diploma {
    background: rgba(184, 121, 26, 0.12);
    color: var(--clr-accent-2);
}

.timeline-desc {
    color: var(--clr-text-secondary);
    font-size: var(--fs-base);
    margin-bottom: 1.25rem;
    line-height: var(--lh-normal);
}

.achievements-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.achievement {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    font-size: var(--fs-sm);
    color: var(--clr-text-secondary);
    background: var(--clr-bg-alt);
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
}

.ach-icon { font-size: 1rem; flex-shrink: 0; line-height: 1.4; }

/* ── PROJET ETERNONE ────────────────────────────────────────── */
.project-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 1.75rem;
}

.project-concept { grid-column: 1 / 2; }
.project-details  { grid-column: 2 / 3; }
.project-learnings { grid-column: 1 / -1; }

.concept-card {
    background: var(--clr-bg-dark);
    border-radius: var(--radius-lg);
    padding: 2rem;
    height: 100%;
}

.concept-label {
    font-size: var(--fs-sm);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--clr-accent-2);
    margin-bottom: 1rem;
}

.concept-card p {
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--fs-lg);
    line-height: var(--lh-normal);
    margin-bottom: 1.75rem;
}
.concept-card strong { color: #fff; }

.project-site-btn {
    display: inline-flex;
    margin-top: 1.5rem;
    width: 100%;
    justify-content: center;
}

.concept-meta {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.meta-pill {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.9rem;
}

.meta-key {
    font-size: var(--fs-sm);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.5);
}

.meta-val {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: #fff;
}

.project-details {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.detail-card {
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-xs);
    flex: 1;
}

.detail-card h4 {
    font-family: var(--font-display);
    font-size: var(--fs-base);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--clr-text);
}

.detail-list li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.5rem;
    font-size: var(--fs-sm);
    color: var(--clr-text-secondary);
    line-height: 1.6;
}
.detail-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--clr-accent-1);
    font-size: 0.7rem;
    top: 0.15em;
}

/* Learnings */
.learnings-title {
    font-family: var(--font-display);
    font-size: var(--fs-2xl);
    font-weight: 700;
    color: var(--clr-text);
    margin-bottom: 1.75rem;
}

.learning-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.learning-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.learning-item:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.learning-icon-wrap {
    font-size: 1.5rem;
    flex-shrink: 0;
    line-height: 1;
}

.learning-item h4 {
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 0.4rem;
}

.learning-item p {
    font-size: var(--fs-sm);
    color: var(--clr-text-secondary);
    line-height: 1.6;
}

/* ── CONTACT ────────────────────────────────────────────────── */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: start;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-xs);
    transition: all var(--dur) var(--ease);
}
.contact-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--clr-accent-2);
    transform: translateX(4px);
}

.contact-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.contact-card-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--clr-text-muted);
}

.contact-card-value {
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--clr-text);
}

.contact-arrow {
    color: var(--clr-accent-2);
    font-size: var(--fs-xl);
    transition: transform var(--dur) var(--ease);
}
.contact-card:hover .contact-arrow {
    transform: translateX(4px);
}

.contact-cta-box {
    background: var(--clr-bg-alt);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.availability-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
    font-size: var(--fs-base);
    color: #16a34a;
}

.contact-cta-box p {
    color: var(--clr-text-secondary);
    font-size: var(--fs-base);
    margin-bottom: 1.5rem;
    line-height: var(--lh-normal);
}

/* Override btn-outline for contact section (light bg) */
.contact-cta-box .btn-primary {
    display: inline-flex;
}

/* ── FOOTER ─────────────────────────────────────────────────── */
footer {
    background: var(--clr-bg-dark);
    padding: 2rem 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--fs-sm);
    color: rgba(255, 255, 255, 0.4);
}

/* ── BACK TO TOP ────────────────────────────────────────────── */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--clr-accent-gradient);
    color: #fff;
    border-radius: 50%;
    font-size: var(--fs-lg);
    box-shadow: var(--shadow-md);
    z-index: 900;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: all var(--dur) var(--ease);
    display: flex;
    align-items: center;
    justify-content: center;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-accent);
}

/* ── SCROLL REVEAL ANIMATIONS ───────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-load {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s var(--ease) 0.2s forwards;
}

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

/* ── PERSONAL SECTION ───────────────────────────────────────── */
.personal-layout {
    display: grid;
    grid-template-columns: 1fr 1.7fr;
    gap: 4rem;
    align-items: start;
}

.personal-intro {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.personal-photo-wrap {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--clr-border);
    margin-bottom: 1.75rem;
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.personal-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.personal-photo-fallback {
    width: 100%;
    height: 100%;
    background: var(--clr-accent-gradient);
    display: none;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
}

.personal-quote {
    background: var(--clr-bg-dark);
    color: rgba(255, 255, 255, 0.78);
    border-left: 3px solid var(--clr-accent-2);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    font-size: var(--fs-base);
    font-style: italic;
    line-height: var(--lh-normal);
    margin: 0 0 1.25rem;
    text-align: left;
}

.personal-desc {
    color: var(--clr-text-secondary);
    font-size: var(--fs-base);
    line-height: var(--lh-normal);
    text-align: left;
}

.personal-block-title {
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--clr-text);
    margin-bottom: 1.25rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--clr-border);
}

.values-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.value-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.value-item:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.value-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    line-height: 1.2;
}

.value-item h4 {
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--clr-text);
    margin-bottom: 0.3rem;
}

.value-item p {
    font-size: var(--fs-sm);
    color: var(--clr-text-secondary);
    line-height: 1.6;
}

.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
    gap: 0.65rem;
}

.interest-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--clr-card);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.9rem;
    font-size: var(--fs-sm);
    font-weight: 500;
    color: var(--clr-text-secondary);
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.interest-item:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.interest-icon { font-size: 1.1rem; flex-shrink: 0; }

/* ── RESPONSIVE ─────────────────────────────────────────────── */

/* Tablet */
@media (max-width: 900px) {
    :root {
        --section-pad: 4rem;
        --fs-5xl: 3.25rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .skills-wrapper {
        grid-template-columns: 1fr;
    }

    .skills-block:first-child {
        grid-column: 1 / -1;
        grid-template-columns: 1fr;
        column-gap: 0;
    }

    .achievements-grid {
        grid-template-columns: 1fr;
    }

    .project-layout {
        grid-template-columns: 1fr;
    }
    .project-concept,
    .project-details,
    .project-learnings {
        grid-column: 1 / -1;
    }

    .contact-layout {
        grid-template-columns: 1fr;
    }

    .personal-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    .personal-intro {
        align-items: flex-start;
        text-align: left;
    }

    .hero-visual { display: none; }
}

/* Mobile */
@media (max-width: 640px) {
    :root {
        --section-pad: 3rem;
        --nav-h: 60px;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-h);
        left: 0; right: 0;
        background: rgba(15, 14, 23, 0.97);
        backdrop-filter: blur(16px);
        flex-direction: column;
        gap: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s var(--ease);
    }

    .nav-links.open {
        max-height: 400px;
    }

    .nav-links li { width: 100%; }
    .nav-links a {
        display: block;
        padding: 1rem 1.5rem;
        color: rgba(255, 255, 255, 0.85);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .nav-links .nav-cta {
        margin: 1rem 1.5rem;
        text-align: center;
    }

    .nav-toggle { display: flex; }

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

    .timeline-item {
        grid-template-columns: auto 1fr;
        gap: 0 1rem;
    }

    .timeline-card { padding: 1.25rem; }

    .timeline-card-header {
        flex-direction: column;
        gap: 0.5rem;
    }

    .footer-inner {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .hero-actions .btn {
        width: 100%;
        text-align: center;
    }

    .back-to-top { bottom: 1.25rem; right: 1.25rem; }
}