/* ============================================================
   jakubhecht.sk - Liquid Glass Portfolio
   ============================================================ */

/* --- Custom Properties --- */
:root {
    --bg: #f7f8fc;
    --bg-elevated: rgba(255, 255, 255, 0.72);
    --bg-elevated-strong: rgba(255, 255, 255, 0.88);
    --bg-section: #eef3ff;

    --glass-bg: linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.46));
    --glass-bg-hover: linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(244, 248, 255, 0.62));
    --glass-border: rgba(255, 255, 255, 0.78);
    --glass-inner: rgba(255, 255, 255, 0.92);
    --glass-blur: blur(28px) saturate(170%);
    --glass-shadow: 0 24px 80px rgba(41, 73, 142, 0.14), 0 8px 26px rgba(30, 41, 59, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.88);

    --accent-from: #2563eb;
    --accent-mid: #6d5dfc;
    --accent-to: #a855f7;
    --accent-gradient: linear-gradient(135deg, #2563eb 0%, #6d5dfc 48%, #a855f7 100%);
    --accent-blue: #2563eb;
    --accent-purple: #7c3aed;
    --accent-soft: rgba(37, 99, 235, 0.1);

    --text-primary: #111827;
    --text-secondary: #475569;
    --text-tertiary: #7c8798;
    --border: rgba(15, 23, 42, 0.08);

    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-pill: 100px;

    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --spring: 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    --nav-height: 72px;
}

/* --- Nav Font --- */
.logo, .nav-links a, .lang-toggle {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background:
        linear-gradient(115deg, rgba(37, 99, 235, 0.12), transparent 34%),
        linear-gradient(245deg, rgba(168, 85, 247, 0.14), transparent 36%),
        linear-gradient(180deg, #ffffff 0%, #f7f8fc 46%, #eef3ff 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent 72%);
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* --- Glass Effect --- */
.glass {
    position: relative;
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.glass::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.08) 42%, rgba(37, 99, 235, 0.08) 100%);
    opacity: 0.72;
}

.glass > * {
    position: relative;
    z-index: 1;
}

/* --- Gradient text utility --- */
.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* --- Container --- */
.container {
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
    position: sticky;
    top: 12px;
    z-index: 100;
    height: var(--nav-height);
    margin: 12px auto 0;
    width: min(calc(100% - 28px), 1080px);
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.62);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid rgba(255, 255, 255, 0.75);
    box-shadow: 0 18px 50px rgba(41, 73, 142, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.95);
    transition: border-color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.82);
    border-color: rgba(37, 99, 235, 0.14);
    box-shadow: 0 20px 60px rgba(41, 73, 142, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.95);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 18px;
}

.logo {
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-primary);
    min-width: 0;
    transition: opacity var(--transition), transform var(--transition);
}

.logo:hover {
    opacity: 0.72;
    transform: translateY(-1px);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: 3px;
}

.nav-links a {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 14px;
    border-radius: var(--radius-pill);
    transition: color var(--transition), background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.92), 0 8px 22px rgba(37, 99, 235, 0.1);
    transform: translateY(-1px);
}

/* Language Toggle */
.lang-toggle {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-blue);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: var(--radius-pill);
    padding: 7px 13px;
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    letter-spacing: 0.04em;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9), 0 10px 24px rgba(37, 99, 235, 0.08);
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.95);
    transform: translateY(-1px) scale(1.03);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.14);
}

/* Hamburger */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.62);
    border: 1px solid rgba(15, 23, 42, 0.06);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-pill);
    transition: background var(--transition), transform var(--transition);
}

.nav-hamburger:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}

.nav-hamburger span {
    display: block;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
    transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
    min-height: calc(78svh - var(--nav-height));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 92px 0 72px;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.hero::before,
.hero::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%) rotate(-8deg);
    width: min(860px, 88vw);
    height: 220px;
    border-radius: 999px;
    pointer-events: none;
}

.hero::before {
    top: 12%;
    background: linear-gradient(100deg, rgba(37, 99, 235, 0.14), rgba(255, 255, 255, 0.18), rgba(168, 85, 247, 0.14));
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.52);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 28px 80px rgba(37, 99, 235, 0.1);
}

.hero::after {
    top: 20%;
    width: min(620px, 76vw);
    height: 120px;
    transform: translateX(-50%) rotate(8deg);
    background: linear-gradient(100deg, rgba(255, 255, 255, 0.48), rgba(37, 99, 235, 0.09), rgba(168, 85, 247, 0.1));
    filter: blur(0.3px);
    opacity: 0.76;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
    max-width: 780px;
    position: relative;
    z-index: 2;
}

.hero .reveal {
    opacity: 1;
    transform: none;
    transition: none;
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent-blue);
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.66);
    border: 1px solid rgba(37, 99, 235, 0.14);
    letter-spacing: 0.02em;
}

/* Heading */
.hero h1 {
    font-size: clamp(3.1rem, 8vw, 6.3rem);
    font-weight: 800;
    line-height: 1.02;
    color: var(--text-primary);
    max-width: 840px;
}

/* The gradient word */
.hero h1 .highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    font-size: clamp(1rem, 1.8vw, 1.18rem);
    color: var(--text-secondary);
    max-width: 560px;
    line-height: 1.75;
}

/* Buttons */
.hero-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    padding: 13px 28px;
    border-radius: var(--radius-pill);
    border: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition), background var(--transition), border-color var(--transition);
    text-decoration: none;
}

.btn:active { transform: scale(0.97) !important; }

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 16px 36px rgba(37, 99, 235, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.btn-primary:hover {
    opacity: 0.92;
    transform: translateY(-3px);
    box-shadow: 0 20px 48px rgba(37, 99, 235, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.68);
    color: var(--text-primary);
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 14px 34px rgba(41, 73, 142, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.92);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.94);
    border-color: rgba(37, 99, 235, 0.14);
    transform: translateY(-3px);
}

/* ============================================================
   Sections
   ============================================================ */
.section {
    padding: 104px 0;
    position: relative;
    z-index: 1;
    scroll-margin-top: calc(var(--nav-height) + 24px);
}

.section-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    color: var(--accent-purple);
    text-transform: uppercase;
    margin-bottom: 28px;
}

#projekty {
    padding-top: 56px;
}

/* ============================================================
   Project Cards
   ============================================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 18px;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: 230px;
    padding: 32px;
    border-radius: var(--radius-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
}

.project-card::after {
    content: '';
    position: absolute;
    inset: auto 22px 22px 22px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.26), rgba(168, 85, 247, 0.24), transparent);
    opacity: 0;
    transition: opacity var(--transition), transform var(--transition);
    transform: translateY(8px);
}

.project-card:hover {
    transform: translateY(-6px);
    background: var(--glass-bg-hover);
    border-color: rgba(37, 99, 235, 0.16);
    box-shadow: 0 28px 86px rgba(41, 73, 142, 0.18), 0 0 0 1px rgba(255, 255, 255, 0.52), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.project-card:hover::after {
    opacity: 1;
    transform: translateY(0);
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.card-tag {
    display: inline-flex;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-blue);
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.14);
    border-radius: var(--radius-pill);
    padding: 4px 12px;
    width: fit-content;
}

.card-tag--status {
    color: #b45309;
    background: rgba(217, 119, 6, 0.1);
    border-color: rgba(217, 119, 6, 0.18);
}

.card-title {
    font-size: 1.32rem;
    font-weight: 800;
    color: var(--text-primary);
}

.card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    flex: 1;
}

.card-link {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 8px;
    transition: gap var(--transition), color var(--transition);
}

.project-card:hover .card-link {
    gap: 9px;
    color: var(--accent-purple);
}

.project-card:hover .arrow { transform: translateX(3px); }
.arrow { display: inline-block; transition: transform var(--transition); }

/* ============================================================
   Tech Stack Pills
   ============================================================ */
.tech-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 11px;
}

.pill {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 9px 18px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.64);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 12px 30px rgba(41, 73, 142, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.92);
    transition: transform var(--transition), color var(--transition), border-color var(--transition), background var(--transition);
}

.pill:hover {
    transform: translateY(-3px);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.94);
    border-color: rgba(37, 99, 235, 0.14);
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    line-height: 1.15;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
}

.section-intro, .about-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.85;
    max-width: 680px;
    margin-bottom: 30px;
}

.current-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.current-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-width: 0;
}

.current-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 32px;
}

.current-preview {
    display: block;
    padding: 0 20px 20px;
    color: var(--accent-blue);
    font-size: 0.8rem;
    font-weight: 600;
}

.current-preview img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.current-tools .pill {
    font-size: 0.78rem;
    padding: 6px 12px;
}

.about-content { max-width: 780px; }

a:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 5px;
}

@media (max-width: 768px) {
    .current-grid { grid-template-columns: 1fr; }
    .current-copy { padding: 26px; }
}

/* ============================================================
   Contact
   ============================================================ */
.section--contact {
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    background:
        linear-gradient(125deg, rgba(37, 99, 235, 0.08), transparent 40%),
        linear-gradient(235deg, rgba(168, 85, 247, 0.1), transparent 42%),
        rgba(255, 255, 255, 0.5);
    text-align: center;
}

.contact-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.contact-email {
    display: inline-block;
    font-size: clamp(1.55rem, 4vw, 2.8rem);
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: opacity var(--transition), transform var(--transition);
}

.contact-email:hover {
    opacity: 0.78;
    transform: translateY(-2px);
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    padding: 26px 0;
    border-top: 1px solid rgba(15, 23, 42, 0.06);
    text-align: center;
    background: rgba(255, 255, 255, 0.42);
}

.footer p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ============================================================
   Scroll Reveal
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(34px);
    transition: opacity var(--spring), transform var(--spring);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal[style*="--d"] {
    transition-delay: var(--d, 0ms);
}

/* ============================================================
   View Transitions
   ============================================================ */
::view-transition-old(root),
::view-transition-new(root) {
    animation-duration: 0.3s;
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
}

::view-transition-old(root) {
    animation-name: vt-fade-out;
}

::view-transition-new(root) {
    animation-name: vt-fade-in;
}

@keyframes vt-fade-out {
    from { opacity: 1; }
    to   { opacity: 0.6; }
}

@keyframes vt-fade-in {
    from { opacity: 0.6; }
    to   { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
    :root {
        --nav-height: 62px;
    }

    .container {
        padding: 0 20px;
    }

    .navbar {
        top: 8px;
        width: min(calc(100% - 20px), 1080px);
        margin-top: 8px;
    }

    .nav-container {
        padding: 0 10px 0 16px;
    }

    .logo {
        font-size: 0.92rem;
    }

    .lang-toggle {
        padding: 7px 11px;
    }

    .nav-hamburger { display: flex; }

    .nav-links {
        display: none;
        position: absolute;
        top: calc(var(--nav-height) + 10px);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 5px;
        padding: 12px;
        background: rgba(255, 255, 255, 0.86);
        -webkit-backdrop-filter: var(--glass-blur);
        backdrop-filter: var(--glass-blur);
        border: 1px solid rgba(255, 255, 255, 0.78);
        box-shadow: 0 24px 70px rgba(41, 73, 142, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.92);
        border-radius: 24px;
    }

    .nav-links.open { display: flex; }

    .nav-links a {
        padding: 12px 16px;
        border-radius: 16px;
    }

    .hero {
        padding: 56px 0 50px;
        min-height: auto;
    }

    .hero::before {
        top: 9%;
        height: 170px;
    }

    .hero::after {
        top: 16%;
        height: 96px;
    }

    .hero-content {
        gap: 23px;
    }

    .hero h1 {
        font-size: clamp(2.28rem, 11vw, 3.15rem);
        max-width: 6.2em;
    }

    .hero-sub {
        max-width: 17rem;
        font-size: 0.98rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        max-width: 17rem;
    }

    .btn { width: 100%; }

    .section {
        padding: 70px 0;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .project-card {
        min-height: 210px;
        padding: 26px;
    }

    .section--contact {
        text-align: left;
    }
}

@media (max-width: 520px) {
    .navbar {
        width: min(calc(100% - 20px), 370px);
        margin-left: 10px;
        margin-right: auto;
    }

    .hero-content {
        align-items: center;
        padding-left: 18px;
        padding-right: 18px;
    }

    .hero::before {
        width: 106vw;
        left: 54%;
    }

    .hero::after {
        width: 88vw;
        left: 54%;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .hero h1 { font-size: 4.1rem; }
}

/* ============================================================
   Scroll Progress (centered, compact)
   ============================================================ */
.scroll-progress {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    height: 2px;
    width: 220px;
    background: rgba(15, 23, 42, 0.06);
    border-radius: 2px;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.scroll-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.1s ease-out;
}

.nav-container {
    position: relative;
    z-index: 2;
}

@media (max-width: 768px) {
    .scroll-progress {
        width: 140px;
        height: 2px;
    }
}