/* ============================================================
   shared.css — Astronomy App shared styles
   ============================================================ */

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

/* ============================================================
   THEMES
   ============================================================ */
:root, [data-theme="dark"] {
    --bg: #0d0d1a;
    --surface: #1a1a2e;
    --surface2: #22223a;
    --border: #2d2d50;
    --text: #e8e8f0;
    --text-muted: #8888aa;
    --accent: #5b9cf6;
    --accent-hover: #7ab3ff;
    --accent-subtle: rgba(91,156,246,0.12);
    --accent-subtle-border: rgba(91,156,246,0.3);
    --danger: #e55353;
    --danger-hover: #ff6b6b;
    --danger-subtle: rgba(229,83,83,0.15);
    --danger-subtle-border: rgba(229,83,83,0.3);
    --success: #4caf7d;
    --success-subtle: rgba(76,175,125,0.15);
    --success-subtle-border: rgba(76,175,125,0.3);
    --warning: #f0a500;
    --warning-subtle: rgba(240,165,0,0.15);
    --warning-subtle-border: rgba(240,165,0,0.3);
    --text-on-accent: #ffffff;
}

[data-theme="light"] {
    --bg: #f4f5fb;
    --surface: #ffffff;
    --surface2: #eaecf5;
    --border: #d0d5e8;
    --text: #1a1a2e;
    --text-muted: #6066a0;
    --accent: #3a7fd4;
    --accent-hover: #2d6fc0;
    --accent-subtle: rgba(58,127,212,0.1);
    --accent-subtle-border: rgba(58,127,212,0.3);
    --danger: #cc2222;
    --danger-hover: #ee4444;
    --danger-subtle: rgba(204,34,34,0.12);
    --danger-subtle-border: rgba(204,34,34,0.3);
    --success: #1a7a40;
    --success-subtle: rgba(26,122,64,0.12);
    --success-subtle-border: rgba(26,122,64,0.3);
    --warning: #9a6000;
    --warning-subtle: rgba(154,96,0,0.12);
    --warning-subtle-border: rgba(154,96,0,0.3);
    --text-on-accent: #ffffff;
}

[data-theme="night"] {
    --bg: #000000;
    --surface: #120000;
    --surface2: #1e0000;
    --border: #3a0000;
    --text: #cc2200;
    --text-muted: #bb3300;
    --accent: #dd2200;
    --accent-hover: #ff3311;
    --accent-subtle: rgba(221,34,0,0.15);
    --accent-subtle-border: rgba(221,34,0,0.35);
    --danger: #ff4422;
    --danger-hover: #ff6644;
    --danger-subtle: rgba(255,68,34,0.15);
    --danger-subtle-border: rgba(255,68,34,0.3);
    --success: #aa2200;
    --success-subtle: rgba(170,34,0,0.15);
    --success-subtle-border: rgba(170,34,0,0.35);
    --warning: #cc3300;
    --warning-subtle: rgba(204,51,0,0.15);
    --warning-subtle-border: rgba(204,51,0,0.35);
    --text-on-accent: #ffccbb;
}

/* ============================================================
   BASE
   ============================================================ */
body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
}

/* ============================================================
   NAV
   ============================================================ */
nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0 1.5rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-brand { font-size: 1.1rem; font-weight: 600; }
.nav-right { display: flex; align-items: center; gap: 0.75rem; }
.nav-user { color: var(--text-muted); font-size: 0.875rem; }

.btn-link {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0;
    text-decoration: underline;
}
.btn-link:hover { color: var(--text); }

.btn-theme {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.15rem 0.5rem;
    line-height: 1.5;
    transition: border-color 0.15s, color 0.15s;
}
.btn-theme:hover { border-color: var(--accent); color: var(--text); }

/* ============================================================
   LAYOUT
   ============================================================ */
main {
    max-width: 700px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* iPad: use more screen width and larger touch targets */
@media (min-width: 768px) and (max-width: 1100px) {
    main { max-width: 90vw; padding: 1.5rem 2rem; }
    body { font-size: 1.05rem; }
    td, th { font-size: 0.95rem; }
    .btn { padding: 0.6rem 1.1rem; font-size: 1rem; min-height: 44px; }
    textarea { min-height: 120px; font-size: 1rem; }
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.page-header h2 { font-size: 1.35rem; font-weight: 600; }
.page-header p, .page-header .sub-text {
    color: var(--text);
    font-size: 0.875rem;
    margin-top: 0.35rem;
}

.section-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.85rem;
    margin-top: 1.5rem;
}
.section-label:first-child { margin-top: 0; }

.count-text { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 0.75rem; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.6rem 1.25rem;
    transition: background 0.15s, opacity 0.15s;
    text-decoration: none;
    display: inline-block;
}

.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--text-on-accent); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-ghost { background: var(--surface2); color: var(--text); }
.btn-ghost:hover:not(:disabled) { background: var(--border); }
.btn-danger { background: var(--danger-subtle); color: var(--danger); border: 1px solid var(--danger-subtle-border); }
.btn-danger:hover:not(:disabled) { opacity: 0.8; }
.btn-warning { background: var(--warning-subtle); color: var(--warning); border: 1px solid var(--warning-subtle-border); }
.btn-warning:hover:not(:disabled) { opacity: 0.8; }
.btn-end { background: var(--warning-subtle); color: var(--warning); border: 1px solid var(--warning-subtle-border); }
.btn-end:hover:not(:disabled) { opacity: 0.8; }
.btn-sm { font-size: 0.8rem; padding: 0.35rem 0.8rem; }

.btn-inline {
    background: none;
    border: none;
    color: var(--accent);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 0;
}
.btn-inline:hover { text-decoration: underline; }

/* ============================================================
   CARDS
   ============================================================ */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1.25rem;
}

/* ============================================================
   FORMS
   ============================================================ */
label {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.field { display: flex; flex-direction: column; gap: 0.35rem; }

.field-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

input[type="text"],
input[type="password"],
input[type="datetime-local"],
select,
textarea {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;          /* ≥16px prevents iOS auto-zoom on focus */
    padding: 0.65rem 0.85rem;
    outline: none;
    transition: border-color 0.15s;
    width: 100%;
    caret-color: var(--accent); /* visible cursor in dark/red mode */
    touch-action: manipulation; /* faster tap response on iOS */
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="datetime-local"]:focus,
select:focus,
textarea:focus { border-color: var(--accent); }

input::placeholder,
textarea::placeholder { color: var(--text-muted); opacity: 0.7; }

select option { background: var(--surface); }
textarea { resize: vertical; min-height: 90px; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.1rem;
}
.form-grid .full { grid-column: 1 / -1; }

@media (max-width: 520px) {
    .form-grid { grid-template-columns: 1fr; }
    .form-grid .full { grid-column: 1; }
}

.actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.75rem;
    flex-wrap: wrap;
    align-items: center;
}

/* ============================================================
   MESSAGES
   ============================================================ */
.message {
    border-radius: 8px;
    font-size: 0.875rem;
    padding: 0.65rem 0.85rem;
    display: none;
}

.message.error {
    background: var(--danger-subtle);
    border: 1px solid var(--danger-subtle-border);
    color: var(--danger);
}

.message.success {
    background: var(--success-subtle);
    border: 1px solid var(--success-subtle-border);
    color: var(--success);
}

/* ============================================================
   LOADING / EMPTY STATES
   ============================================================ */
.loading-state, .loading {
    color: var(--text-muted);
    padding: 3rem 0;
    text-align: center;
}

.empty-text {
    color: var(--text-muted);
    text-align: center;
    padding: 2rem 0;
}

/* ============================================================
   MODAL
   ============================================================ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    z-index: 100;
}

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 2rem;
    width: 100%;
    max-width: 480px;
}

.modal h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.75rem; }
.modal .modal-meta { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 1.25rem; }
.modal p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1rem; }
.modal label { display: block; margin-bottom: 0.35rem; }
.modal textarea { margin-bottom: 1.5rem; min-height: 120px; }
.modal-actions { display: flex; gap: 0.75rem; justify-content: flex-end; flex-wrap: wrap; }

/* ============================================================
   SEARCH BAR
   ============================================================ */
.search-bar {
    position: relative;
    margin-bottom: 1rem;
}

.search-bar input {
    padding: 0.65rem 2.75rem 0.65rem 0.9rem;
    font-size: 0.95rem;
}

.clear-btn {
    position: absolute;
    right: 0.65rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 0.2rem;
}
.clear-btn:hover { color: var(--text); }