/* ════════════════════════════════════════════════════════════
   EVENT THEME — TechTalk Summits
   Shared styles for all attendee-facing event pages.
   Loaded alongside layout.css + Bootstrap 5.
   ════════════════════════════════════════════════════════════ */

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

/* ── CSS Custom Properties (Design Tokens) ── */
:root {
    --tts-primary: #1a7fa6;
    --tts-primary-dark: #156080;
    --tts-primary-light: #eaf5fb;
    --tts-primary-border: #c5e0ed;

    --tts-bg: #f4f6f8;
    --tts-card-bg: #fff;
    --tts-border: #e0e8ef;
    --tts-border-light: #e8ecf0;

    --tts-text: #1a2332;
    --tts-text-secondary: #666;
    --tts-text-muted: #aaa;
    --tts-text-hint: #888;

    --tts-success: #22a06b;
    --tts-success-bg: #e2f5ec;
    --tts-success-border: #b8e0cf;

    --tts-danger: #e84040;
    --tts-danger-bg: #fde8e8;

    --tts-warning: #e6a817;
    --tts-warning-bg: #fff8e6;

    --tts-radius-sm: 10px;
    --tts-radius-md: 14px;
    --tts-radius-lg: 16px;
    --tts-radius-pill: 20px;

    --tts-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --tts-shadow-md: 0 4px 14px rgba(26, 127, 166, 0.1);
    --tts-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
}

/* ── Base Overrides ── */
.event-app {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--tts-bg);
    color: var(--tts-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── App Header ── */
.app-header {
    background: var(--tts-primary);
    padding: 18px 20px 16px;
    position: sticky;
    top: 0;
    overflow: hidden;
    flex-shrink: 0;
    z-index: 100;
}

.app-header::before {
    content: "";
    position: absolute;
    bottom: -40px;
    right: -40px;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    pointer-events: none;
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-brand img {
    height: 24px;
    filter: brightness(0) invert(1);
}

.event-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--tts-radius-pill);
    padding: 4px 12px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.92);
    font-weight: 500;
}

.event-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #fff;
    opacity: 0.8;
}

.header-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    margin-top: 10px;
    position: relative;
    z-index: 1;
}

.header-sub {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.72);
    margin-top: 3px;
    position: relative;
    z-index: 1;
}

.header-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: border-color 0.2s;
}

.header-avatar:hover {
    border-color: rgba(255, 255, 255, 0.6);
}

/* ── Screen / Page Body ── */
.screen-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 16px 100px;
}

/* ── Cards ── */
.tts-card {
    background: var(--tts-card-bg);
    border: 1.5px solid var(--tts-border);
    border-radius: var(--tts-radius-md);
    padding: 16px;
    margin-bottom: 10px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.tts-card:hover {
    border-color: var(--tts-primary);
    box-shadow: var(--tts-shadow-md);
}

.tts-card.no-hover:hover {
    border-color: var(--tts-border);
    box-shadow: none;
}

/* ── Buttons ── */
.tts-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
    border-radius: var(--tts-radius-sm);
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: background 0.2s, transform 0.1s;
}

.tts-btn:active {
    transform: scale(0.98);
}

.tts-btn-primary {
    background: var(--tts-primary);
    color: #fff;
}

.tts-btn-primary:hover {
    background: var(--tts-primary-dark);
}

.tts-btn-primary:disabled {
    background: #c5d8e2;
    cursor: not-allowed;
}

.tts-btn-success {
    background: var(--tts-success);
    color: #fff;
}

.tts-btn-success:hover {
    background: #1a8558;
}

.tts-btn-outline {
    background: transparent;
    border: 1.5px solid var(--tts-border);
    color: var(--tts-text-secondary);
}

.tts-btn-outline:hover {
    border-color: var(--tts-primary);
    color: var(--tts-primary);
}

.tts-btn-block {
    width: 100%;
}

.tts-btn-lg {
    padding: 15px 24px;
    font-size: 15px;
    font-weight: 700;
    border-radius: 12px;
}

/* ── Chips / Badges ── */
.tts-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--tts-radius-pill);
}

.tts-chip-success {
    background: var(--tts-success-bg);
    color: var(--tts-success);
}

.tts-chip-danger {
    background: var(--tts-danger-bg);
    color: var(--tts-danger);
}

.tts-chip-primary {
    background: var(--tts-primary-light);
    color: var(--tts-primary);
}

.tts-chip-muted {
    background: #f0f0f0;
    color: var(--tts-text-hint);
}

/* ── Labels ── */
.tts-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--tts-primary);
    margin-bottom: 6px;
}

.tts-section-label {
    font-size: 12px;
    font-weight: 700;
    color: var(--tts-text-hint);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

/* ── Form Inputs ── */
.tts-input {
    border: 2px solid var(--tts-border);
    border-radius: var(--tts-radius-sm);
    padding: 12px 16px;
    font-size: 14px;
    font-family: inherit;
    color: var(--tts-text);
    width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--tts-card-bg);
}

.tts-input:focus {
    outline: none;
    border-color: var(--tts-primary);
    box-shadow: 0 0 0 3px rgba(26, 127, 166, 0.1);
}

.tts-input::placeholder {
    color: var(--tts-text-muted);
}

/* ── Bottom Navigation ── */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-top: 1px solid var(--tts-border);
    display: flex;
    justify-content: center;
    z-index: 1000;
    padding: 0;
}

.bottom-nav-inner {
    display: flex;
    width: 100%;
    max-width: 480px;
}

.nav-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 4px 6px;
    text-decoration: none;
    color: var(--tts-text-muted);
    font-size: 10px;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
    gap: 3px;
}

.nav-tab i {
    font-size: 18px;
    margin-bottom: 1px;
}

.nav-tab:hover {
    color: var(--tts-primary);
    text-decoration: none;
}

.nav-tab.active {
    color: var(--tts-primary);
}

.nav-tab.active::after {
    content: "";
    position: absolute;
    top: 0;
    left: 25%;
    right: 25%;
    height: 3px;
    background: var(--tts-primary);
    border-radius: 0 0 3px 3px;
}

/* ── Animations ── */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-up {
    animation: fadeUp 0.22s ease;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ── Empty State ── */
.tts-empty {
    text-align: center;
    padding: 48px 20px;
    color: var(--tts-text-muted);
}

.tts-empty i,
.tts-empty-icon i {
    font-size: 48px;
    margin-bottom: 12px;
    display: block;
}

.tts-empty-icon {
    margin-bottom: 4px;
}

.tts-empty-title,
.tts-empty-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--tts-text);
    margin-bottom: 4px;
}

.tts-empty-sub {
    font-size: 13px;
    color: var(--tts-text-hint);
}

/* ── Profile Modal (restyled) ── */
.profile-modal .modal-content {
    border-radius: var(--tts-radius-lg);
    border: none;
}

.profile-modal .modal-header {
    border-bottom: 1px solid var(--tts-border-light);
    padding: 16px 20px;
}

.profile-modal .modal-body {
    padding: 20px;
}

.profile-field-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--tts-text-hint);
    margin-bottom: 4px;
}

/* ── Spinner Override ── */
.tts-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

/* ── Utility ── */
.text-tts-primary { color: var(--tts-primary) !important; }
.text-tts-success { color: var(--tts-success) !important; }
.text-tts-danger { color: var(--tts-danger) !important; }
.text-tts-muted { color: var(--tts-text-muted) !important; }
.bg-tts-primary { background: var(--tts-primary) !important; }
.bg-tts-light { background: var(--tts-bg) !important; }

/* ── Responsive ── */
@media (max-width: 576px) {
    .screen-body {
        padding: 14px 14px 100px;
    }

    .app-header {
        padding: 16px 16px 14px;
    }
}