/* ============================================================================
   SENIT — Main Stylesheet (mobile-first, responsive)
   ============================================================================ */

/* --------------------------------------------------------------------------
   DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
    --amber:        #d97706;
    --amber-hover:  #b45309;
    --amber-light:  #fef3c7;
    --amber-pale:   #fffbeb;

    --ink:          #1c1917;
    --ink-soft:     #44403c;
    --muted:        #78716c;
    --muted-soft:   #a8a29e;
    --border:       #e7e5e4;
    --border-soft:  #f5f5f4;
    --bg:           #fafaf9;
    --bg-card:      #ffffff;

    --red:          #b91c1c;
    --red-light:    #fee2e2;
    --green:        #15803d;
    --green-light:  #dcfce7;
    --blue:         #1d4ed8;
    --blue-light:   #dbeafe;

    --shadow-sm:    0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:    0 4px 16px rgba(0,0,0,0.06);
    --shadow-lg:    0 16px 48px rgba(0,0,0,0.08);
    --shadow-xl:    0 24px 64px rgba(0,0,0,0.12);

    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 24px;
    --sp-6: 32px;
    --sp-7: 48px;
    --sp-8: 64px;

    --r-sm:   6px;
    --r-md:   10px;
    --r-lg:   16px;
    --r-pill: 999px;

    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', Menlo, Monaco, Consolas, monospace;
    --font-serif: 'Iowan Old Style', 'Palatino', Georgia, serif;

    --nav-height: 60px;
    --max-container: 1120px;
    --max-narrow: 640px;
    --max-content: 880px;

    --z-nav: 50;
    --z-dropdown: 60;
    --z-drawer: 70;
    --z-backdrop: 65;
}

/* --------------------------------------------------------------------------
   RESET / BASE
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}
main { flex: 1; }

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--sp-4);
    line-height: 1.25;
    letter-spacing: -0.02em;
    font-weight: 700;
    color: var(--ink);
    word-wrap: break-word;
}
h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.0625rem; }
h5 { font-size: 1rem; }

@media (min-width: 760px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.375rem; }
    h4 { font-size: 1.125rem; }
}

p { margin: 0 0 var(--sp-4); }
a { color: var(--amber); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--amber-hover); text-decoration: underline; }

img, svg, video { max-width: 100%; height: auto; display: block; }

hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: var(--sp-6) 0;
}

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--border-soft);
    padding: 2px 6px;
    border-radius: var(--r-sm);
    word-break: break-word;
}

::selection { background: var(--amber-light); color: var(--amber-hover); }

/* --------------------------------------------------------------------------
   LAYOUT
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--max-container);
    margin: 0 auto;
    padding: 0 var(--sp-4);
    width: 100%;
}
@media (min-width: 760px) {
    .container { padding: 0 var(--sp-5); }
}
.container-narrow { max-width: var(--max-narrow); }
.container-content { max-width: var(--max-content); }

.section { padding: var(--sp-6) 0; }
@media (min-width: 760px) { .section { padding: var(--sp-7) 0; } }
.section-lg { padding: var(--sp-7) 0; }
@media (min-width: 760px) { .section-lg { padding: var(--sp-8) 0; } }

.stack > * + * { margin-top: var(--sp-4); }
.stack-lg > * + * { margin-top: var(--sp-5); }
.stack-xl > * + * { margin-top: var(--sp-6); }

.grid { display: grid; gap: var(--sp-4); }
@media (min-width: 760px) {
    .grid { gap: var(--sp-5); }
    .grid-2 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.flex { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-3); flex-wrap: wrap; }

.text-center { text-align: center; }
.text-muted { color: var(--muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

/* --------------------------------------------------------------------------
   NAV / HEADER
   -------------------------------------------------------------------------- */
.nav {
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
}
.nav-inner {
    height: var(--nav-height);
    display: flex;
    align-items: center;
    gap: var(--sp-3);
}

/* Brand (left) */
.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--ink);
    text-decoration: none;
    flex-shrink: 0;
}
.nav-brand:hover { color: var(--ink); text-decoration: none; }
.nav-brand-mark {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--amber);
    display: inline-block;
    position: relative;
    flex-shrink: 0;
}
.nav-brand-mark::after {
    content: "";
    position: absolute;
    inset: 4px;
    border-radius: 50%;
    background: var(--amber-light);
}

/* Nav links (center, desktop only) */
.nav-links {
    display: none;
    gap: var(--sp-1);
    flex: 1;
    justify-content: center;
}
@media (min-width: 880px) {
    .nav-links { display: flex; }
}
.nav-link {
    color: var(--ink-soft);
    padding: var(--sp-2) var(--sp-3);
    border-radius: var(--r-sm);
    font-weight: 500;
    font-size: 0.9375rem;
    text-decoration: none;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}
.nav-link:hover { background: var(--border-soft); color: var(--ink); text-decoration: none; }
.nav-link.active { color: var(--amber); background: var(--amber-pale); }

/* Actions (right) */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    margin-left: auto;
    flex-shrink: 0;
}

/* Desktop-only items */
.nav-login-btn, .nav-register-btn, .user-menu {
    display: none;
}
@media (min-width: 760px) {
    .nav-login-btn, .nav-register-btn, .user-menu { display: inline-flex; }
}

/* Hamburger button */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    cursor: pointer;
    padding: 0;
    transition: background 0.15s, border 0.15s;
}
.nav-toggle:hover { background: var(--border-soft); }
.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
@media (min-width: 880px) {
    .nav-toggle { display: none; }
}

/* Mobile menu drawer */
.mobile-menu {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    animation: slideDown 0.2s ease-out;
}
.mobile-menu[hidden] { display: none; }
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
.mobile-nav {
    display: flex;
    flex-direction: column;
    padding: var(--sp-3) 0;
    gap: 2px;
}
.mobile-nav hr { margin: var(--sp-2) 0; }
.mobile-nav-link {
    display: block;
    padding: var(--sp-3) var(--sp-4);
    color: var(--ink-soft);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    border-radius: var(--r-sm);
    background: none;
    border: 0;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
}
.mobile-nav-link:hover { background: var(--border-soft); color: var(--ink); text-decoration: none; }
.mobile-nav-primary {
    background: var(--amber);
    color: white;
    text-align: center;
    margin-top: var(--sp-2);
}
.mobile-nav-primary:hover { background: var(--amber-hover); color: white; }
.mobile-nav-danger { color: var(--red); }

@media (min-width: 880px) {
    .mobile-menu { display: none !important; }
}

/* Language switcher */
.lang-switcher, .user-menu {
    position: relative;
}
.lang-switcher summary, .user-menu summary {
    list-style: none;
    cursor: pointer;
    user-select: none;
}
.lang-switcher summary::-webkit-details-marker,
.user-menu summary::-webkit-details-marker { display: none; }

.lang-summary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    color: var(--ink-soft);
    font-size: 0.8125rem;
    font-weight: 600;
    background: var(--bg-card);
    transition: background 0.15s, border 0.15s;
    height: 40px;
}
.lang-summary:hover { background: var(--border-soft); border-color: var(--muted-soft); }
.lang-code { font-weight: 700; }

.user-summary {
    padding: 0;
    border-radius: 50%;
}

.lang-menu, .user-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: var(--sp-1);
    z-index: var(--z-dropdown);
    animation: dropFade 0.15s ease-out;
}
@keyframes dropFade {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}
.lang-item, .dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--sp-2) var(--sp-3);
    color: var(--ink-soft);
    text-decoration: none;
    border-radius: var(--r-sm);
    font-size: 0.9375rem;
    background: none;
    border: 0;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
}
.lang-item:hover, .dropdown-item:hover {
    background: var(--bg);
    color: var(--ink);
    text-decoration: none;
}
.lang-item.active {
    background: var(--amber-pale);
    color: var(--amber);
    font-weight: 600;
}
.lang-item .check { color: var(--amber); font-weight: 700; }

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--amber);
    color: white;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    flex-shrink: 0;
}
.user-info {
    padding: var(--sp-3);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--sp-1);
}
.user-name { font-weight: 600; font-size: 0.9375rem; color: var(--ink); }
.user-email { font-size: 0.8125rem; color: var(--muted); word-break: break-all; }
.logout-form { margin: 0; padding: 0; }

/* --------------------------------------------------------------------------
   BUTTONS
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: var(--sp-3) var(--sp-5);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9375rem;
    line-height: 1;
    border-radius: var(--r-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, border 0.15s, color 0.15s, transform 0.05s;
    white-space: nowrap;
    min-height: 42px;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; pointer-events: none; }

.btn-primary { background: var(--amber); color: white; }
.btn-primary:hover { background: var(--amber-hover); color: white; }

.btn-secondary { background: var(--bg-card); color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { background: var(--border-soft); color: var(--ink); border-color: var(--muted-soft); }

.btn-ghost { background: transparent; color: var(--ink-soft); }
.btn-ghost:hover { background: var(--border-soft); color: var(--ink); }

.btn-danger { background: var(--red); color: white; }
.btn-danger:hover { background: #991b1b; color: white; }

.btn-sm { padding: 8px 14px; font-size: 0.875rem; min-height: 36px; }
.btn-lg { padding: var(--sp-4) var(--sp-6); font-size: 1rem; min-height: 48px; }
.btn-block { width: 100%; }

/* --------------------------------------------------------------------------
   CARDS / PANELS
   -------------------------------------------------------------------------- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
}
@media (min-width: 760px) { .card { padding: var(--sp-6); } }
.card-sm { padding: var(--sp-4); }
.card-lg { padding: var(--sp-5); }
@media (min-width: 760px) { .card-lg { padding: var(--sp-7); } }
.card-hover { transition: border 0.15s, box-shadow 0.15s, transform 0.15s; }
.card-hover:hover { border-color: var(--amber); box-shadow: var(--shadow-md); }

.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: var(--sp-4);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-1);
    padding: 4px 10px;
    border-radius: var(--r-pill);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    background: var(--amber-light);
    color: var(--amber-hover);
    white-space: nowrap;
}
.badge-muted { background: var(--border-soft); color: var(--muted); }
.badge-green { background: var(--green-light); color: var(--green); }
.badge-red { background: var(--red-light); color: var(--red); }
.badge-blue { background: var(--blue-light); color: var(--blue); }

/* --------------------------------------------------------------------------
   FORMS
   -------------------------------------------------------------------------- */
.form-group { display: flex; flex-direction: column; gap: var(--sp-2); margin-bottom: var(--sp-4); }
.form-label { font-weight: 600; font-size: 0.875rem; color: var(--ink); }
.form-label small { font-weight: 400; color: var(--muted); margin-left: var(--sp-1); }
.form-hint { font-size: 0.8125rem; color: var(--muted); margin-top: -4px; }
.form-error {
    font-size: 0.8125rem;
    color: var(--red);
    background: var(--red-light);
    padding: var(--sp-3);
    border-radius: var(--r-sm);
    margin-bottom: var(--sp-4);
}

.input, .textarea, .select {
    font-family: inherit;
    font-size: 16px; /* Prevents iOS zoom on focus */
    line-height: 1.4;
    padding: var(--sp-3) var(--sp-4);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    color: var(--ink);
    width: 100%;
    transition: border 0.15s, box-shadow 0.15s;
    min-height: 44px;
}
.input:focus, .textarea:focus, .select:focus {
    outline: 0;
    border-color: var(--amber);
    box-shadow: 0 0 0 3px var(--amber-light);
}
.input::placeholder, .textarea::placeholder { color: var(--muted-soft); }

.textarea { min-height: 140px; resize: vertical; line-height: 1.6; }

.input-group { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.input-group .input { flex: 1; min-width: 0; }

.checkbox, .radio {
    display: inline-flex;
    align-items: flex-start;
    gap: var(--sp-2);
    cursor: pointer;
    user-select: none;
}
.checkbox input, .radio input { margin: 0; width: 18px; height: 18px; accent-color: var(--amber); margin-top: 2px; flex-shrink: 0; }

.range {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: var(--r-pill);
    outline: 0;
}
.range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    background: var(--amber);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}
.range::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: var(--amber);
    border-radius: 50%;
    cursor: pointer;
    border: 0;
}

/* --------------------------------------------------------------------------
   FLASH MESSAGES
   -------------------------------------------------------------------------- */
.flash {
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--r-md);
    margin-bottom: var(--sp-4);
    font-size: 0.9375rem;
    border: 1px solid transparent;
}
.flash-info    { background: var(--blue-light);  color: var(--blue);  border-color: #bfdbfe; }
.flash-success { background: var(--green-light); color: var(--green); border-color: #bbf7d0; }
.flash-warning { background: var(--amber-light); color: var(--amber-hover); border-color: #fde68a; }
.flash-error   { background: var(--red-light);   color: var(--red);   border-color: #fecaca; }

/* --------------------------------------------------------------------------
   HERO
   -------------------------------------------------------------------------- */
.hero {
    padding: var(--sp-7) 0 var(--sp-6);
    text-align: center;
    background: linear-gradient(180deg, var(--amber-pale) 0%, var(--bg) 100%);
    border-bottom: 1px solid var(--border);
}
@media (min-width: 760px) {
    .hero { padding: var(--sp-8) 0 var(--sp-7); }
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    background: var(--bg-card);
    color: var(--amber);
    padding: var(--sp-2) var(--sp-4);
    border-radius: var(--r-pill);
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--border);
    margin-bottom: var(--sp-4);
}
.hero h1 {
    font-size: clamp(1.875rem, 5vw + 1rem, 3.75rem);
    letter-spacing: -0.03em;
    margin-bottom: var(--sp-4);
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.hero h1 em { color: var(--amber); font-style: normal; }
.hero-subtitle {
    font-size: 1rem;
    color: var(--ink-soft);
    max-width: 520px;
    margin: 0 auto var(--sp-5);
}
@media (min-width: 760px) { .hero-subtitle { font-size: 1.125rem; margin-bottom: var(--sp-6); } }
.hero-cta {
    display: flex;
    gap: var(--sp-3);
    justify-content: center;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   MODE CARDS
   -------------------------------------------------------------------------- */
.modes-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-4);
}
@media (min-width: 600px) {
    .modes-grid { grid-template-columns: repeat(2, 1fr); gap: var(--sp-5); }
}
@media (min-width: 900px) {
    .modes-grid { grid-template-columns: repeat(3, 1fr); }
}
.mode-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    transition: border 0.15s, box-shadow 0.15s;
}
.mode-card:hover { border-color: var(--amber); box-shadow: var(--shadow-md); }
.mode-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--r-md);
    background: var(--amber-pale);
    color: var(--amber);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.mode-card h3 { margin-bottom: 0; font-size: 1.0625rem; }
.mode-card p { color: var(--muted); font-size: 0.9375rem; margin-bottom: 0; }

/* --------------------------------------------------------------------------
   CAPSULE GRID
   -------------------------------------------------------------------------- */
.capsules-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-4);
}
@media (min-width: 600px) {
    .capsules-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}
.capsule-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
    display: flex;
    flex-direction: column;
    gap: var(--sp-3);
    position: relative;
    transition: border 0.15s, box-shadow 0.15s, transform 0.15s;
    text-decoration: none;
    color: inherit;
}
.capsule-card:hover {
    border-color: var(--amber);
    box-shadow: var(--shadow-md);
    color: inherit;
    text-decoration: none;
    transform: translateY(-2px);
}
.capsule-card-header { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2); flex-wrap: wrap; }
.capsule-card-title {
    font-weight: 600;
    font-size: 1.0625rem;
    color: var(--ink);
    margin: 0;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-wrap: break-word;
}
.capsule-card-countdown { font-variant-numeric: tabular-nums; font-weight: 700; font-size: 1.25rem; color: var(--amber); }
.capsule-card-meta { display: flex; align-items: center; gap: var(--sp-2); font-size: 0.8125rem; color: var(--muted); flex-wrap: wrap; }
.capsule-card-meta .dot { width: 4px; height: 4px; background: var(--muted-soft); border-radius: 50%; flex-shrink: 0; }

/* --------------------------------------------------------------------------
   COMPOSER
   -------------------------------------------------------------------------- */
.composer { max-width: var(--max-content); margin: 0 auto; }
.composer-steps {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    margin-bottom: var(--sp-5);
    flex-wrap: wrap;
    font-size: 0.8125rem;
}
@media (min-width: 760px) {
    .composer-steps { gap: var(--sp-3); font-size: 0.875rem; }
}
.composer-step { display: flex; align-items: center; gap: var(--sp-2); color: var(--muted); font-weight: 500; }
.composer-step-num {
    width: 24px; height: 24px;
    border-radius: 50%;
    background: var(--border);
    color: var(--muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}
.composer-step.active { color: var(--ink); }
.composer-step.active .composer-step-num { background: var(--amber); color: white; }
.composer-step.done .composer-step-num { background: var(--green); color: white; }

.mode-selector {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-3);
}
@media (min-width: 600px) {
    .mode-selector { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}
.mode-selector label {
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-4);
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    position: relative;
}
.mode-selector label:hover { border-color: var(--amber); }
.mode-selector input[type="radio"] { display: none; }
.mode-selector label:has(input:checked) {
    border-color: var(--amber);
    background: var(--amber-pale);
    box-shadow: 0 0 0 4px rgba(232, 169, 66, 0.18);
    transform: translateY(-1px);
}
.mode-selector label:has(input:checked)::after {
    content: '✓';
    position: absolute;
    top: var(--sp-3);
    right: var(--sp-3);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--amber);
    color: white;
    font-weight: 700;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.mode-selector-title { font-weight: 600; color: var(--ink); }
.mode-selector-desc { font-size: 0.8125rem; color: var(--muted); }

/* --------------------------------------------------------------------------
   CAPSULE DETAIL / UNLOCK
   -------------------------------------------------------------------------- */
.capsule-detail { max-width: var(--max-content); margin: 0 auto; }
.capsule-header { padding: var(--sp-5) 0; text-align: center; border-bottom: 1px solid var(--border); margin-bottom: var(--sp-5); }
.capsule-title { font-size: clamp(1.5rem, 4vw, 2.5rem); margin-bottom: var(--sp-3); }
.capsule-meta-line { color: var(--muted); font-size: 0.9375rem; }

.countdown {
    display: grid;
    grid-template-columns: repeat(4, minmax(56px, 1fr));
    gap: var(--sp-2);
    margin: var(--sp-5) auto;
    max-width: 360px;
}
.countdown-unit {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: var(--sp-3) var(--sp-2);
    text-align: center;
}
@media (min-width: 600px) {
    .countdown { max-width: 440px; }
    .countdown-unit { padding: var(--sp-4); }
}
.countdown-value { font-size: 1.5rem; font-weight: 700; color: var(--amber); font-variant-numeric: tabular-nums; line-height: 1; }
@media (min-width: 600px) { .countdown-value { font-size: 2rem; } }
.countdown-label { font-size: 0.625rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); margin-top: var(--sp-1); }

.sealed-scene { padding: var(--sp-6) var(--sp-4); text-align: center; }
.sealed-seal {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--sp-5);
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, var(--amber-light), var(--amber));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    box-shadow: 0 8px 32px rgba(217, 119, 6, 0.25);
    animation: seal-pulse 3s ease-in-out infinite;
}
@media (min-width: 600px) {
    .sealed-seal { width: 140px; height: 140px; font-size: 3.5rem; }
    .sealed-scene { padding: var(--sp-7) var(--sp-5); }
}
@keyframes seal-pulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.04); }
}

.unlock-ceremony { animation: fade-in 0.8s ease-out; }
@keyframes fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.capsule-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-5) var(--sp-4);
    font-family: var(--font-serif);
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--ink-soft);
    white-space: pre-wrap;
    word-wrap: break-word;
}
@media (min-width: 600px) {
    .capsule-content { padding: var(--sp-7) var(--sp-6); font-size: 1.125rem; }
}

/* --------------------------------------------------------------------------
   AUTH PAGES
   -------------------------------------------------------------------------- */
.auth-page {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--sp-5) var(--sp-4);
}
.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: var(--sp-5);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}
@media (min-width: 600px) { .auth-card { padding: var(--sp-7); } }
.auth-card h1 { font-size: 1.5rem; text-align: center; margin-bottom: var(--sp-2); }
@media (min-width: 600px) { .auth-card h1 { font-size: 1.75rem; } }
.auth-card-subtitle { text-align: center; color: var(--muted); margin-bottom: var(--sp-5); }
.auth-divider { display: flex; align-items: center; gap: var(--sp-3); margin: var(--sp-5) 0; color: var(--muted); font-size: 0.8125rem; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.auth-footer { text-align: center; margin-top: var(--sp-5); font-size: 0.9375rem; color: var(--muted); }
.google-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--ink);
    font-weight: 600;
    padding: var(--sp-3) var(--sp-5);
    border-radius: var(--r-md);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-3);
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s;
    min-height: 48px;
}
.google-btn:hover { background: var(--bg); text-decoration: none; color: var(--ink); }

/* --------------------------------------------------------------------------
   FOOTER
   -------------------------------------------------------------------------- */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: var(--sp-6) 0 var(--sp-4);
    margin-top: var(--sp-7);
}
@media (min-width: 760px) {
    .footer { padding: var(--sp-7) 0 var(--sp-5); margin-top: var(--sp-8); }
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--sp-5);
    margin-bottom: var(--sp-5);
}
@media (min-width: 600px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 900px) {
    .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr; gap: var(--sp-5); }
    .footer-brand, .footer-donate { grid-column: auto; }
}
.footer-brand { grid-column: 1 / -1; }
@media (min-width: 900px) { .footer-brand { grid-column: auto; } }
.footer-logo { display: flex; align-items: center; gap: var(--sp-2); margin-bottom: var(--sp-2); }
.footer-tagline { color: var(--muted); font-size: 0.9375rem; margin: 0; }
.footer-col h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: var(--sp-3);
    font-weight: 700;
}
.footer-col a { display: block; color: var(--ink-soft); padding: 4px 0; font-size: 0.9375rem; text-decoration: none; }
.footer-col a:hover { color: var(--amber); text-decoration: none; }
.footer-donate-text { font-size: 0.8125rem; color: var(--muted); margin-bottom: var(--sp-3); }
.donate-links { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.donate-btn {
    background: var(--amber-pale);
    color: var(--amber);
    padding: var(--sp-2) var(--sp-3);
    border-radius: var(--r-sm);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--amber-light);
    text-decoration: none;
}
.donate-btn:hover { background: var(--amber-light); text-decoration: none; color: var(--amber-hover); }
.footer-bottom {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    justify-content: space-between;
    align-items: center;
    padding-top: var(--sp-4);
    border-top: 1px solid var(--border);
    font-size: 0.8125rem;
    color: var(--muted);
    text-align: center;
}
@media (min-width: 600px) {
    .footer-bottom { flex-direction: row; }
}

/* --------------------------------------------------------------------------
   UTILITIES
   -------------------------------------------------------------------------- */
.hidden { display: none !important; }
.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); border: 0;
}
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-2 { margin-top: var(--sp-2); }
.mb-2 { margin-bottom: var(--sp-2); }
.mt-4 { margin-top: var(--sp-4); }
.mb-4 { margin-bottom: var(--sp-4); }
.mt-6 { margin-top: var(--sp-6); }
.mb-6 { margin-bottom: var(--sp-6); }

.empty-state { text-align: center; padding: var(--sp-7) var(--sp-4); color: var(--muted); }
.empty-state-icon { font-size: 3rem; margin-bottom: var(--sp-4); opacity: 0.5; }
.empty-state h3 { color: var(--ink); }