/* ═══════════════════════════════════════════
   MiningCalc — Основные стили
   Палитра: тёмный графит + янтарь + аква
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
    --bg-deep: #0b0d14;
    --bg-primary: #0f111a;
    --bg-secondary: #161a26;
    --bg-card: rgba(22, 26, 38, 0.85);
    --bg-card-hover: rgba(30, 36, 52, 0.9);
    --bg-elevated: #1e2434;

    /* Текст */
    --text-primary: #e8ecf4;
    --text-secondary: #8891a8;
    --text-muted: #4f5670;

    /* Акценты — янтарь для позитива, коралл для негатива */
    --accent-gold: #f0b429;
    --accent-gold-dim: rgba(240, 180, 41, 0.1);
    --accent-green: #2dd4a0;
    --accent-green-bg: rgba(45, 212, 160, 0.08);
    --accent-red: #f87178;
    --accent-red-bg: rgba(248, 113, 120, 0.08);
    --accent-blue: #60a5fa;
    --accent-blue-bg: rgba(96, 165, 250, 0.08);
    --accent-orange: #f59e0b;
    --accent-orange-bg: rgba(245, 158, 11, 0.08);

    --border-color: #1e2440;
    --border-light: #2a3250;
    --radius: 4px;

    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

    --header-height: 48px;
    --max-width: 1280px;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-deep);
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(240, 180, 41, 0.015) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(96, 165, 250, 0.01) 0%, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-blue); text-decoration: none; }
a:hover { opacity: 0.85; }

::selection { background: var(--accent-gold); color: var(--bg-deep); }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: #2a3250; border-radius: 2px; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 16px; width: 100%; }

/* ═══════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════ */
.header {
    background: rgba(11, 13, 20, 0.95);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    position: sticky; top: 0; z-index: 100;
}
.header__inner {
    display: flex; align-items: center; height: 100%; gap: 8px;
}
.header__logo {
    display: flex; align-items: center; gap: 6px;
    color: var(--text-primary); text-decoration: none;
    font-weight: 700; font-size: 0.85rem;
    letter-spacing: -0.2px; flex-shrink: 0;
    padding: 0 8px;
}
.header__logo:hover { text-decoration: none; opacity: 0.85; }

.nav { flex: 1; }
.nav__list {
    display: flex; list-style: none; align-items: center; height: 100%;
}
.nav__link {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 0 12px; height: var(--header-height);
    color: var(--text-muted); font-size: 0.78rem; font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: color 0.15s, border-color 0.15s;
    white-space: nowrap; text-decoration: none;
}
.nav__link:hover { color: var(--text-primary); background: transparent; text-decoration: none; }
.nav__link--active { color: var(--accent-gold); border-bottom-color: var(--accent-gold); }
.nav__link--placeholder { cursor: not-allowed; opacity: 0.3; }

.header__admin-btn {
    font-size: 0.9rem; padding: 4px 8px; color: var(--text-muted);
    transition: color 0.15s; flex-shrink: 0; text-decoration: none;
}
.header__admin-btn:hover { color: var(--text-primary); text-decoration: none; }

/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */
.hero { padding: 36px 0 16px; text-align: center; }
.hero__title {
    font-size: 1.25rem; font-weight: 700; letter-spacing: -0.3px;
    color: var(--text-primary); margin-bottom: 6px;
}
.hero__subtitle { color: var(--text-secondary); font-size: 0.85rem; max-width: 480px; margin: 0 auto; }

/* ═══════════════════════════════════════════
   CALCULATOR
   ═══════════════════════════════════════════ */
.calculator { padding: 8px 0 36px; }
.calculator__card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); padding: 20px;
}
.calc-form { display: flex; flex-direction: column; gap: 16px; }
.calc-form__row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.calc-form__group { display: flex; flex-direction: column; gap: 4px; }
.calc-form__label {
    font-size: 0.62rem; font-weight: 600; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.8px;
}
.calc-form__select, .calc-form__input {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: var(--radius); color: var(--text-primary);
    padding: 7px 10px; font-size: 0.82rem; font-family: var(--font-sans);
    outline: none; transition: border-color 0.15s; width: 100%;
}
.calc-form__select:focus, .calc-form__input:focus { border-color: var(--accent-gold); }
.calc-form__input:disabled { opacity: 0.35; cursor: not-allowed; }

.btn-group { display: flex; gap: 2px; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 4px;
    padding: 6px 12px; border: 1px solid var(--border-color);
    border-radius: var(--radius); background: transparent;
    color: var(--text-muted); font-size: 0.78rem; font-weight: 500;
    cursor: pointer; transition: all 0.12s;
    font-family: var(--font-sans); white-space: nowrap; text-decoration: none;
}
.btn:hover { background: var(--bg-card-hover); color: var(--text-primary); border-color: var(--border-light); }
.btn--active { background: var(--accent-gold-dim); color: var(--accent-gold); border-color: var(--accent-gold); }
.btn--primary { background: var(--accent-gold); color: var(--bg-deep); border-color: var(--accent-gold); font-weight: 600; }
.btn--primary:hover { background: #f3c449; color: var(--bg-deep); }
.btn--primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn--lg { padding: 9px 20px; font-size: 0.85rem; }
.btn--full { width: 100%; }
.btn--outline { background: transparent; color: var(--text-secondary); border-color: var(--border-color); }
.btn--outline:hover { background: var(--bg-card-hover); }
.btn--sm { padding: 3px 8px; font-size: 0.72rem; }
.btn--success { background: var(--accent-green); color: var(--bg-deep); border-color: var(--accent-green); }
.btn--danger { background: transparent; border-color: var(--accent-red); color: var(--accent-red); }
.btn--danger:hover { background: var(--accent-red-bg); }

.calc-form__actions { display: flex; justify-content: center; }

/* ═══════════════════════════════════════════
   RESULTS
   ═══════════════════════════════════════════ */
.results { margin-top: 16px; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
.results__header { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.results__title { font-size: 0.85rem; font-weight: 600; }
.results__timestamp { font-size: 0.65rem; color: var(--text-muted); font-family: var(--font-mono); }
.results__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 8px; margin-bottom: 12px; }

.result-card {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); padding: 16px; text-align: center;
}
.result-card:hover { border-color: var(--border-light); }
.result-card--primary { border-color: var(--accent-gold); border-width: 1px; }
.result-card--green { border-left: 2px solid var(--accent-green); }
.result-card--red { border-left: 2px solid var(--accent-red); }
.result-card__label { font-size: 0.6rem; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text-muted); margin-bottom: 4px; font-weight: 600; }
.result-card__value { font-size: 1.3rem; font-weight: 700; font-family: var(--font-mono); margin-bottom: 2px; }
.result-card--primary .result-card__value { color: var(--accent-gold); }
.result-card--green .result-card__value { color: var(--accent-green); }
.result-card--red .result-card__value { color: var(--accent-red); }
.result-card__sub { font-size: 0.72rem; color: var(--text-muted); font-family: var(--font-mono); }

.results__details {
    background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px;
}
.results__details-title { font-size: 0.72rem; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.details-table { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
.details-table td { padding: 4px 6px; border-bottom: 1px solid var(--border-color); }
.details-table tr:last-child td { border-bottom: none; }
.details-table td:first-child { color: var(--text-muted); width: 50%; }
.details-table td:last-child { font-family: var(--font-mono); text-align: right; font-weight: 500; }

.market-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 6px; }
.market-item { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 8px 10px; text-align: center; }
.market-item__label { display: block; font-size: 0.58rem; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.5px; margin-bottom: 2px; font-weight: 600; }
.market-item__value { font-size: 0.82rem; font-weight: 600; font-family: var(--font-mono); }

/* ═══════════════════════════════════════════
   LOADING / ERROR
   ═══════════════════════════════════════════ */
.loading { text-align: center; padding: 36px; }
.loading__spinner {
    width: 24px; height: 24px;
    border: 2px solid var(--border-color); border-top-color: var(--accent-gold);
    border-radius: 50%; animation: spin 0.7s linear infinite;
    margin: 0 auto 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading__text { color: var(--text-muted); font-size: 0.8rem; }
.error-msg { background: var(--accent-red-bg); border: 1px solid var(--accent-red); border-radius: var(--radius); padding: 8px 12px; margin-top: 8px; }
.error-msg__text { color: var(--accent-red); font-weight: 500; font-size: 0.8rem; }

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
.footer { margin-top: auto; border-top: 1px solid var(--border-color); padding: 12px 0; }
.footer__inner { display: flex; flex-direction: column; gap: 4px; text-align: center; }
.footer__text { font-size: 0.75rem; font-weight: 500; }
.footer__hint { font-size: 0.65rem; color: var(--text-muted); }
.footer__links { display: flex; justify-content: center; gap: 6px; align-items: center; }
.footer__link { color: var(--text-secondary); font-size: 0.72rem; }
.footer__sep { color: var(--text-muted); }
.footer__copy { font-size: 0.65rem; color: var(--text-muted); }

/* ═══════════════════════════════════════════
   ADMIN LOGIN
   ═══════════════════════════════════════════ */
.admin-login { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - var(--header-height) - 100px); padding: 32px 0; }
.admin-login__card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 28px; width: 100%; max-width: 360px; }
.admin-login__header { text-align: center; margin-bottom: 20px; }
.admin-login__title { font-size: 1rem; font-weight: 600; }
.admin-login__form { display: flex; flex-direction: column; gap: 12px; }
.admin-login__group { display: flex; flex-direction: column; gap: 4px; }
.admin-login__label { font-size: 0.72rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.admin-login__input { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius); color: var(--text-primary); padding: 8px 12px; font-size: 0.85rem; outline: none; transition: border-color 0.15s; }
.admin-login__input:focus { border-color: var(--accent-gold); }
.admin-login__error { color: var(--accent-red); font-size: 0.8rem; text-align: center; padding: 6px; background: var(--accent-red-bg); border-radius: var(--radius); }

@media (max-width: 768px) {
    .hero__title { font-size: 1.05rem; }
    .calculator__card { padding: 14px; }
    .calc-form__row { grid-template-columns: 1fr; }
    .results__grid { grid-template-columns: 1fr; }
    .result-card__value { font-size: 1.1rem; }
    .nav__link { padding: 0 8px; font-size: 0.72rem; }
    .header__logo-text { display: none; }
}

@media (max-width: 480px) {
    .container { padding: 0 10px; }
    .btn-group .btn { flex: 1; font-size: 0.72rem; padding: 5px 8px; }
}