/* =========================================================
   BLUEBERRY SECRETS v2.0 — stylesheet
   Dark + neon-violet glassmorphism, mobile-first
   ========================================================= */

:root {
    /* Barevná paleta */
    --bg-deep: #05020a;
    --bg-soft: #0c0716;
    --violet: #a682ff;
    --violet-soft: #c8b3ff;
    --violet-deep: #6a48d8;
    --blueberry: #5c3fb2;
    --pink-glow: #ff7ad9;
    --cyan-glow: #6ad7ff;

    /* Sklo */
    --glass-bg: rgba(166, 130, 255, 0.06);
    --glass-bg-strong: rgba(166, 130, 255, 0.10);
    --glass-border: rgba(255, 255, 255, 0.10);
    --glass-border-hot: rgba(166, 130, 255, 0.35);
    --glass-blur: 22px;

    /* Text */
    --text: #f4f0ff;
    --text-dim: rgba(244, 240, 255, 0.65);
    --text-faint: rgba(244, 240, 255, 0.40);

    /* Typografie */
    --font-display: 'Fraunces', 'Times New Roman', serif;
    --font-body: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    /* Rozměry */
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-pill: 999px;

    /* Stíny / záře */
    --glow-violet: 0 0 24px rgba(166, 130, 255, 0.45);
    --glow-violet-strong: 0 0 40px rgba(166, 130, 255, 0.65), 0 0 12px rgba(166, 130, 255, 0.9);
    --shadow-card: 0 18px 60px -20px rgba(0, 0, 0, 0.7), 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ===== Animované pozadí ===== */
.bg-layer {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background:
        radial-gradient(ellipse at top, #16092b 0%, var(--bg-deep) 55%),
        var(--bg-deep);
}

/* Aurora skvrny */
.aurora {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    mix-blend-mode: screen;
    will-change: transform;
}
.aurora--1 {
    width: 520px; height: 520px;
    background: radial-gradient(circle, var(--violet) 0%, transparent 70%);
    top: -10%; left: -10%;
    animation: drift1 22s ease-in-out infinite alternate;
}
.aurora--2 {
    width: 460px; height: 460px;
    background: radial-gradient(circle, var(--pink-glow) 0%, transparent 70%);
    bottom: -15%; right: -10%;
    animation: drift2 28s ease-in-out infinite alternate;
}
.aurora--3 {
    width: 380px; height: 380px;
    background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 70%);
    top: 40%; left: 50%;
    opacity: 0.25;
    animation: drift3 34s ease-in-out infinite alternate;
}
@keyframes drift1 { to { transform: translate(120px, 80px) scale(1.15); } }
@keyframes drift2 { to { transform: translate(-100px, -60px) scale(1.1); } }
@keyframes drift3 { to { transform: translate(-80px, 100px) scale(0.9); } }

/* Šum / film grain */
.grain {
    position: absolute;
    inset: -50%;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' seed='5'/><feColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.4 0'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.5'/></svg>");
    opacity: 0.12;
    pointer-events: none;
    mix-blend-mode: overlay;
}

/* Plovoucí borůvky (vytváří JS) */
.floating-berries {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.berry {
    position: absolute;
    user-select: none;
    will-change: transform;
    animation-name: floatBerry;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    animation-direction: alternate;
    filter: drop-shadow(0 0 14px rgba(166, 130, 255, 0.45));
    opacity: 0.6;
}
@keyframes floatBerry {
    0%   { transform: translate(0, 0) rotate(0deg); }
    50%  { transform: translate(20px, -30px) rotate(15deg); }
    100% { transform: translate(-15px, 25px) rotate(-12deg); }
}

/* ===== Hlavička ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    background: linear-gradient(180deg, rgba(5, 2, 10, 0.75) 0%, rgba(5, 2, 10, 0.35) 100%);
    border-bottom: 1px solid var(--glass-border);
}
.header__inner {
    max-width: 720px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo__mark {
    font-size: 28px;
    filter: drop-shadow(0 0 10px rgba(166, 130, 255, 0.7));
    animation: bobble 3.5s ease-in-out infinite;
}
@keyframes bobble {
    0%, 100% { transform: translateY(0) rotate(-3deg); }
    50%      { transform: translateY(-3px) rotate(5deg); }
}
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 19px;
    letter-spacing: -0.02em;
    color: var(--text);
}
.logo__dot { color: var(--violet); }
.logo__sub {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-faint);
    margin-top: 4px;
    letter-spacing: 0.05em;
}

.nav { display: flex; align-items: center; gap: 8px; }
.nav__link {
    padding: 8px 12px;
    font-size: 14px;
    color: var(--text-dim);
    border-radius: var(--radius-pill);
    transition: color 0.2s, background 0.2s;
    display: none;
}
.nav__link:hover { color: var(--text); }
.nav__link--active { color: var(--violet-soft); }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 600;
    transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}
.btn--ghost {
    background: var(--glass-bg-strong);
    border: 1px solid var(--glass-border-hot);
    color: var(--violet-soft);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.btn--ghost:hover {
    background: rgba(166, 130, 255, 0.18);
    box-shadow: var(--glow-violet);
    transform: translateY(-1px);
}
.btn--ghost:active { transform: translateY(0); }

/* ===== Hero ===== */
.hero {
    max-width: 720px;
    margin: 0 auto;
    padding: 56px 20px 32px;
    text-align: left;
}
.hero__eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--violet);
    margin: 0 0 18px;
    opacity: 0;
    animation: fadeUp 0.7s 0.1s ease-out forwards;
}
.hero__title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(36px, 9vw, 64px);
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin: 0 0 18px;
    color: var(--text);
    opacity: 0;
    animation: fadeUp 0.8s 0.2s ease-out forwards;
}
.hero__title em {
    font-style: italic;
    background: linear-gradient(135deg, var(--violet) 0%, var(--pink-glow) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}
.cursor {
    display: inline-block;
    width: 4px;
    height: 0.85em;
    background: var(--violet);
    margin-left: 4px;
    vertical-align: -0.1em;
    box-shadow: var(--glow-violet);
    animation: blink 1.1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero__lede {
    font-size: 16px;
    color: var(--text-dim);
    max-width: 540px;
    margin: 0 0 28px;
    opacity: 0;
    animation: fadeUp 0.8s 0.35s ease-out forwards;
}
.hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    opacity: 0;
    animation: fadeUp 0.8s 0.5s ease-out forwards;
}
.meta-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-pill);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    font-size: 12px;
    color: var(--text-dim);
}
.meta-pill strong { color: var(--text); font-weight: 600; }
.meta-pill__dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: #5cff9c;
    box-shadow: 0 0 8px #5cff9c, 0 0 14px #5cff9c;
    animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== Feed ===== */
.feed {
    max-width: 720px;
    margin: 0 auto;
    padding: 24px 20px 60px;
}
.feed__head {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 20px;
}
.feed__title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 22px;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--text);
}
.feed__filter {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
}
.feed__filter::-webkit-scrollbar { display: none; }
.chip {
    padding: 7px 14px;
    border-radius: var(--radius-pill);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
    font-size: 12px;
    font-weight: 500;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    white-space: nowrap;
    transition: color 0.2s, background 0.2s, border-color 0.2s;
}
.chip:hover { color: var(--text); }
.chip--active {
    color: var(--violet-soft);
    background: var(--glass-bg-strong);
    border-color: var(--glass-border-hot);
}

/* ===== Karta přiznání ===== */
.cards {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.card {
    position: relative;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 22px 22px 18px;
    backdrop-filter: blur(var(--glass-blur)) saturate(140%);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(140%);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    animation: cardIn 0.7s ease-out forwards;
}
.card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg,
        rgba(255, 255, 255, 0.18) 0%,
        rgba(166, 130, 255, 0.25) 35%,
        transparent 70%);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}
@keyframes cardIn {
    to { opacity: 1; transform: translateY(0); }
}
.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }

.card__head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}
.card__avatar {
    flex-shrink: 0;
    width: 40px; height: 40px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 22px;
    background: radial-gradient(circle at 30% 25%, var(--violet) 0%, var(--blueberry) 60%, #2a1a5a 100%);
    border: 1px solid var(--glass-border-hot);
    box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.15), 0 0 12px rgba(166, 130, 255, 0.3);
}
.card__nick {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    flex: 1;
    min-width: 0;
}
.card__nickname {
    font-family: var(--font-display);
    font-weight: 600;
    font-style: italic;
    font-size: 16px;
    color: var(--text);
    letter-spacing: -0.01em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.card__time {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-faint);
    margin-top: 3px;
    letter-spacing: 0.03em;
}

.card__body {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text);
    margin: 0 0 18px;
    white-space: pre-wrap;
    word-break: break-word;
}
.card__body::first-letter {
    font-family: var(--font-display);
    font-size: 1.15em;
    font-weight: 600;
    color: var(--violet-soft);
}

.card__foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 14px;
    border-top: 1px solid var(--glass-border);
}

/* Like tlačítko */
.like-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px 8px 12px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    transition: background 0.2s, border-color 0.2s, transform 0.15s;
    -webkit-tap-highlight-color: transparent;
}
.like-btn:hover {
    background: rgba(166, 130, 255, 0.10);
    border-color: var(--glass-border-hot);
}
.like-btn:active { transform: scale(0.96); }

.like-btn__icon {
    font-size: 18px;
    line-height: 1;
    display: inline-block;
    transition: filter 0.3s, transform 0.3s;
    filter: grayscale(0.6) brightness(0.85);
}
.like-btn__count {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dim);
    min-width: 1.5ch;
    text-align: left;
    transition: color 0.3s;
}

/* Stav: lajknuto */
.like-btn--liked {
    background: rgba(166, 130, 255, 0.14);
    border-color: var(--violet);
    box-shadow: var(--glow-violet);
}
.like-btn--liked .like-btn__icon {
    filter: drop-shadow(0 0 6px var(--violet)) drop-shadow(0 0 12px var(--violet));
    animation: pop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.like-btn--liked .like-btn__count {
    color: var(--violet-soft);
    font-weight: 600;
}
@keyframes pop {
    0%   { transform: scale(1); }
    35%  { transform: scale(1.45) rotate(-12deg); }
    70%  { transform: scale(0.9) rotate(8deg); }
    100% { transform: scale(1) rotate(0); }
}

/* Float-up borůvky při lajku (JS spawnuje) */
.berry-burst {
    position: absolute;
    pointer-events: none;
    font-size: 16px;
    animation: burst 0.9s ease-out forwards;
    filter: drop-shadow(0 0 6px var(--violet));
    will-change: transform, opacity;
}
@keyframes burst {
    0%   { opacity: 1; transform: translate(-50%, 0) scale(0.6); }
    100% { opacity: 0; transform: translate(var(--dx), -60px) scale(1.1); }
}

.card__share {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-faint);
    padding: 6px 10px;
    border-radius: var(--radius-pill);
    transition: color 0.2s, background 0.2s;
}
.card__share:hover {
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.04);
}

/* Konec feedu */
.feed__end {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 40px;
    color: var(--text-faint);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.05em;
}
.feed__end-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
}

/* ===== Patička ===== */
.footer {
    text-align: center;
    padding: 30px 20px 50px;
    color: var(--text-faint);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.04em;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(20, 10, 40, 0.85);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--glass-border-hot);
    color: var(--text);
    padding: 12px 20px;
    border-radius: var(--radius-pill);
    font-size: 13px;
    box-shadow: var(--glow-violet), 0 10px 30px rgba(0, 0, 0, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 100;
    max-width: 90vw;
    text-align: center;
}
.toast--visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== Responzivita ===== */
@media (min-width: 640px) {
    .hero { padding: 80px 20px 40px; }
    .nav__link { display: inline-block; }
    .feed__head {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
    .card { padding: 26px 26px 20px; }
    .card__avatar { width: 44px; height: 44px; font-size: 24px; }
    .card__nickname { font-size: 17px; }
    .card__body { font-size: 16px; }
}

@media (min-width: 900px) {
    .hero { padding: 100px 20px 50px; }
}

/* ===== Pomocné: snížený motion ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .berry { display: none; }
}