:root {
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.78rem;
    --font-size-sm: 0.92rem;
    --font-size-base: 1rem;
    --font-size-md: 1.12rem;
    --font-size-lg: 1.48rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 2.5rem;
    --font-size-3xl: 3rem;
    --spacing-xs: 0.45rem;
    --spacing-sm: 0.8rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.8rem;
    --spacing-3xl: 4rem;
    --button-border-radius: 18px;
    --card-border-radius: 24px;
    --shadow-card: 0 22px 48px rgba(0, 0, 0, 0.22);
}

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

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: var(--font-family);
    color: var(--color-text-primary);
    background:
        radial-gradient(circle at top left, rgba(99, 102, 241, 0.28), transparent 30%),
        radial-gradient(circle at 80% 10%, rgba(34, 211, 238, 0.18), transparent 20%),
        linear-gradient(145deg, #090b15 0%, #111522 48%, #151a2e 100%);
}

button,
input,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

.hidden {
    display: none !important;
}

.app-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(260px, 320px) minmax(0, 1fr);
}

.app-sidebar {
    position: sticky;
    top: 0;
    align-self: start;
    min-height: 100vh;
    padding: var(--spacing-xl);
    background: rgba(9, 12, 24, 0.82);
    border-right: 1px solid rgba(148, 163, 184, 0.12);
    backdrop-filter: blur(16px);
}

.app-content {
    padding: var(--spacing-xl);
}

.brand-block,
.session-card,
.category-panel,
.login-card,
.stat-card,
.channel-card,
.player-shell {
    border: 1px solid rgba(148, 163, 184, 0.16);
    background: rgba(20, 24, 38, 0.82);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(18px);
}

.brand-block {
    padding: var(--spacing-lg);
    border-radius: var(--card-border-radius);
    margin-bottom: var(--spacing-lg);
}

.brand-logo-wrap {
    width: 78px;
    height: 78px;
    border-radius: 22px;
    display: grid;
    place-items: center;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.22), rgba(34, 211, 238, 0.16));
}

.brand-logo {
    width: 58px;
    height: 58px;
    object-fit: contain;
}

.brand-title,
.toolbar-title,
.player-title {
    margin: 0;
    font-size: clamp(1.8rem, 2vw, 2.6rem);
    line-height: 1.1;
}

.brand-subtitle,
.muted,
.player-note,
.stat-card span,
.session-username {
    color: var(--color-text-secondary);
}

.eyebrow {
    margin: 0 0 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--color-secondary-light);
    font-size: 0.72rem;
}

.session-card,
.category-panel {
    border-radius: 24px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.session-label {
    margin: 0 0 0.45rem;
    color: var(--color-text-muted);
    font-size: 0.88rem;
}

.session-tenant-name {
    margin: 0 0 0.3rem;
    font-size: 1.4rem;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.count-badge,
.filter-pill,
.secure-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 0.9rem;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(99, 102, 241, 0.16);
    color: var(--color-text-primary);
    font-size: 0.84rem;
}

.category-list {
    display: grid;
    gap: 0.55rem;
}

.category-button {
    width: 100%;
    border: 1px solid transparent;
    background: rgba(37, 37, 66, 0.72);
    color: var(--color-text-secondary);
    text-align: left;
    border-radius: 16px;
    padding: 0.85rem 1rem;
    transition: 180ms ease;
}

.category-button:hover,
.category-button.is-active {
    color: var(--color-text-primary);
    border-color: rgba(99, 102, 241, 0.75);
    background: rgba(99, 102, 241, 0.2);
}

.toolbar {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.toolbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.search-box,
.field-group {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.search-box span,
.field-group label {
    color: var(--color-text-secondary);
    font-size: 0.88rem;
}

.search-box input,
.input-field {
    min-height: 50px;
    width: 100%;
    padding: 0 1rem;
    color: var(--color-text-primary);
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(10, 14, 25, 0.74);
    outline: none;
}

.search-box input:focus,
.input-field:focus {
    border-color: rgba(99, 102, 241, 0.85);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.18);
}

.btn {
    min-height: 50px;
    border: 1px solid transparent;
    padding: 0 1rem;
    border-radius: 16px;
    transition: 180ms ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary-dark));
    color: #fff;
}

.btn-primary:hover {
    filter: brightness(1.06);
}

.btn-secondary {
    background: rgba(37, 37, 66, 0.75);
    color: var(--color-text-primary);
    border-color: rgba(148, 163, 184, 0.18);
}

.btn-secondary:hover {
    background: rgba(55, 65, 81, 0.95);
}

.view {
    min-height: calc(100vh - (2 * var(--spacing-xl)));
}

.login-card {
    width: min(560px, 100%);
    padding: clamp(1.5rem, 3vw, 2.4rem);
    border-radius: 28px;
    margin: min(6vh, 5rem) auto 0;
}

.login-card-header {
    margin-bottom: var(--spacing-lg);
}

.login-card h2 {
    margin: 0 0 0.6rem;
    font-size: clamp(1.7rem, 2vw, 2.3rem);
}

.login-form {
    display: grid;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feedback {
    margin-top: var(--spacing-md);
    padding: 0.95rem 1rem;
    border-radius: 16px;
    font-size: 0.95rem;
}

#dashboard-feedback {
    margin: 0 0 var(--spacing-lg);
}

.feedback.is-error {
    border: 1px solid rgba(239, 68, 68, 0.28);
    background: rgba(239, 68, 68, 0.12);
    color: #fecaca;
}

.feedback.is-success {
    border: 1px solid rgba(34, 197, 94, 0.28);
    background: rgba(34, 197, 94, 0.12);
    color: #bbf7d0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    padding: 1.2rem 1.25rem;
    border-radius: 22px;
}

.stat-card strong {
    display: block;
    margin-bottom: 0.45rem;
    font-size: 1.4rem;
}

.channel-section {
    padding: var(--spacing-lg);
    border-radius: 28px;
    border: 1px solid rgba(148, 163, 184, 0.12);
    background: rgba(8, 11, 20, 0.46);
}

.channels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(205px, 1fr));
    gap: var(--spacing-md);
}

.channel-card {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    padding: 1rem;
}

.channel-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.04), transparent 42%, rgba(34, 211, 238, 0.08));
    pointer-events: none;
}

.channel-logo {
    position: relative;
    z-index: 1;
    width: 100%;
    aspect-ratio: 16 / 11;
    border-radius: 18px;
    display: grid;
    place-items: center;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    margin-bottom: 1rem;
}

.channel-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 1rem;
}

.channel-fallback {
    font-size: 2rem;
}

.channel-name,
.channel-category {
    position: relative;
    z-index: 1;
}

.channel-name {
    margin: 0 0 0.4rem;
    font-size: 1.05rem;
}

.channel-category {
    margin: 0 0 0.9rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.channel-actions {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.live-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: #a7f3d0;
    font-size: 0.82rem;
}

.live-pill::before {
    content: '';
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--color-success);
    box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.12);
}

.play-button {
    min-height: 40px;
    padding: 0 0.9rem;
    border-radius: 999px;
    border: none;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.9), rgba(14, 165, 233, 0.92));
    color: #fff;
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem 2rem;
    color: var(--color-text-secondary);
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

.player-modal {
    position: fixed;
    inset: 0;
    z-index: 40;
    display: grid;
    place-items: center;
    padding: 2rem;
}

.player-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 6, 14, 0.78);
    backdrop-filter: blur(8px);
}

.player-shell {
    position: relative;
    z-index: 1;
    width: min(1180px, 100%);
    border-radius: 28px;
    padding: 1.25rem;
}

.player-topbar,
.player-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.player-frame {
    position: relative;
    margin: 1rem 0;
    aspect-ratio: 16 / 9;
    background: #000;
    border-radius: 22px;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.player-frame video {
    width: 100%;
    height: 100%;
    background: #000;
    pointer-events: none;
}

.player-status {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    text-align: center;
    background: linear-gradient(180deg, rgba(2, 6, 23, 0.6), rgba(2, 6, 23, 0.85));
    color: #fff;
    font-size: 1rem;
    z-index: 2;
}

.player-status-content {
    width: min(460px, calc(100% - 2rem));
    display: grid;
    gap: 1rem;
    justify-items: center;
}

.player-status-text {
    margin: 0;
    line-height: 1.5;
}

.player-status.is-error {
    color: #fecaca;
}

.player-modal:fullscreen {
    padding: 0;
    background: #000;
}

.player-modal:fullscreen .player-shell {
    width: 100vw;
    height: 100vh;
    max-width: none;
    border-radius: 0;
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: stretch;
}

.player-modal:fullscreen .player-frame {
    flex: 1;
    aspect-ratio: auto;
    min-height: 0;
    margin: 0.85rem 0;
}

.player-footer {
    align-items: flex-start;
}

@media (max-width: 1100px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        position: static;
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

@media (max-width: 720px) {
    .app-content,
    .app-sidebar,
    .player-modal {
        padding: 1rem;
    }

    .channels-grid {
        grid-template-columns: 1fr;
    }

    .player-topbar,
    .player-footer {
        flex-direction: column;
        align-items: stretch;
    }
}