/* ═══════════════════════════════════════════════════════
   AUTH PAGES — Minimalist Monochrome
   Shared by: login.html / signup.html / forgot-password.html
   ═══════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700;900&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;1,8..60,400&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── Design Tokens ── */
:root {
    --bg:           #ffffff;
    --fg:           #000000;
    --muted-bg:     #f5f5f5;
    --muted-fg:     #525252;
    --border:       #000000;
    --border-light: #e5e5e5;
    color-scheme:   light;
}

[data-theme="dark"] {
    --bg:           #000000;
    --fg:           #ffffff;
    --muted-bg:     #111111;
    --muted-fg:     #888888;
    --border:       #ffffff;
    --border-light: #2a2a2a;
    color-scheme:   dark;
}

/* ── Reset ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

/* ── Body ── */
body {
    background: var(--bg);
    color: var(--fg);
    font-family: 'Source Serif 4', Georgia, serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.1s, color 0.1s;
}

.hidden { display: none !important; }
.w-full { width: 100%; }

/* ── Loading Overlay ── */
#loading {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    color: #fff;
    flex-direction: column;
    gap: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.1s, visibility 0.1s;
}
#loading.show { opacity: 1; visibility: visible; }

/* Square spinner — Monochrome */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top: 3px solid #fff;
    border-radius: 0;
    animation: spin 0.65s linear infinite;
}

.loading-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
}

@keyframes spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ── Top Navigation ── */
.mono-nav {
    border-bottom: 2px solid var(--border);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.mono-nav-brand {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--fg);
}

.mono-nav-back {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--fg);
    border-bottom: 1.5px solid var(--border);
    padding-bottom: 1px;
    transition: opacity 0.1s;
}
.mono-nav-back:hover { opacity: 0.5; }

/* ── Scroll Container ── */
.view {
    flex: 1;
    overflow-y: auto;
    padding: 52px 24px 60px;
    scroll-behavior: smooth;
}

/* ── Auth Container ── */
.auth-container {
    max-width: 440px;
    margin: 0 auto;
    width: 100%;
}

/* ── Editorial Header ── */
.auth-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    color: var(--muted-fg);
    margin-bottom: 14px;
}

.auth-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(2.8rem, 11vw, 4.8rem);
    font-weight: 900;
    line-height: 1.04;
    letter-spacing: -0.02em;
    color: var(--fg);
    margin-bottom: 10px;
}

.auth-rule {
    border: none;
    border-top: 4px solid var(--border);
    margin: 22px 0 30px;
}

/* ── Tab Switcher ── */
.auth-tabs {
    display: flex;
    border: 2px solid var(--border);
    margin-bottom: 28px;
}

.tab-btn {
    flex: 1;
    padding: 12px 10px;
    background: transparent;
    border: none;
    border-right: 1px solid var(--border);
    color: var(--muted-fg);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    transition: background 0.08s, color 0.08s;
}
.tab-btn:last-child { border-right: none; }
.tab-btn:hover:not(.active) { background: var(--muted-bg); }
.tab-btn.active {
    background: var(--fg);
    color: var(--bg);
}

/* ── Form Labels ── */
label {
    display: block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.64rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--muted-fg);
    margin-bottom: 6px;
}

/* ── Inputs ── */
input, select {
    width: 100%;
    padding: 13px 14px;
    margin-bottom: 20px;
    border: 2px solid var(--border);
    border-radius: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: 'Source Serif 4', Georgia, serif;
    font-size: 1rem;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: border-width 0.06s;
}

input:focus, select:focus { border-width: 3px; }

input::placeholder {
    color: var(--muted-fg);
    font-style: italic;
}

option { background: var(--bg); color: var(--fg); }

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--bg) inset !important;
    -webkit-text-fill-color: var(--fg) !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border: 2px solid var(--border);
    border-radius: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.08s, color 0.08s;
}
.btn:active { opacity: 0.82; }

.btn-primary {
    background: var(--fg);
    color: var(--bg);
    border-color: var(--fg);
}
.btn-primary:hover {
    background: var(--bg);
    color: var(--fg);
}

.btn-outline {
    background: transparent;
    color: var(--fg);
    border-color: var(--border);
}
.btn-outline:hover {
    background: var(--fg);
    color: var(--bg);
}

/* ── Text Links ── */
a.link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    font-weight: 400;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--fg);
    text-decoration: underline;
    text-decoration-style: dashed;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}
a.link:hover {
    text-decoration-style: solid;
    font-weight: 600;
}

/* ── Page Load ── */
body.loading { overflow: hidden; }
body.loaded { animation: fadeIn 0.15s ease; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Cloudflare Turnstile Widget ── */
.turnstile-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    min-height: 65px;     /* giữ layout ổn định khi widget đang tải */
}