/* ========================================
   Getube - Design System & Styles
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    /* Colors */
    --color-bg: #0a0a0f;
    --color-bg-elevated: rgba(255, 255, 255, 0.04);
    --color-bg-card: rgba(255, 255, 255, 0.06);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-focus: rgba(255, 0, 51, 0.5);
    --color-text: #f0f0f5;
    --color-text-muted: #8888a0;
    --color-text-dim: #55556a;

    --color-primary: #FF0033;
    --color-primary-dark: #CC0029;
    --color-primary-glow: rgba(255, 0, 51, 0.25);
    --color-primary-subtle: rgba(255, 0, 51, 0.08);

    --color-success: #00d68f;
    --color-error: #ff3d71;
    --color-warning: #ffaa00;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-primary-glow);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* --- Background Glow Effects --- */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.bg-glow--1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
    top: -200px;
    right: -100px;
    animation: glow-drift-1 12s ease-in-out infinite alternate;
}

.bg-glow--2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #6600ff 0%, transparent 70%);
    bottom: -150px;
    left: -100px;
    animation: glow-drift-2 15s ease-in-out infinite alternate;
}

@keyframes glow-drift-1 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-60px, 80px) scale(1.15); }
}

@keyframes glow-drift-2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(80px, -60px) scale(1.1); }
}

/* --- Container --- */
.container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 520px;
    padding: var(--space-xl);
}

/* --- Header --- */
.header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

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

.logo__icon {
    width: 48px;
    height: 48px;
    filter: drop-shadow(0 4px 12px var(--color-primary-glow));
    transition: transform var(--transition-base);
}

.logo:hover .logo__icon {
    transform: scale(1.08) rotate(-3deg);
}

.logo__text {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary) 0%, #ff6680 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.header__subtitle {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* --- Card (Glassmorphism) --- */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: var(--shadow-lg);
    transition: border-color var(--transition-base);
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.12);
}

/* --- Form --- */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form__label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form__input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.form__input-icon {
    position: absolute;
    left: var(--space-md);
    width: 18px;
    height: 18px;
    color: var(--color-text-dim);
    pointer-events: none;
    transition: color var(--transition-base);
}

.form__input {
    width: 100%;
    padding: var(--space-md) var(--space-md) var(--space-md) calc(var(--space-md) + 18px + var(--space-sm));
    background: var(--color-bg-elevated);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    outline: none;
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.form__input::placeholder {
    color: var(--color-text-dim);
}

.form__input:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.06);
}

.form__input:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px var(--color-primary-subtle), var(--shadow-sm);
    background: rgba(255, 255, 255, 0.06);
}

.form__input:focus ~ .form__input-icon,
.form__input-wrapper:focus-within .form__input-icon {
    color: var(--color-primary);
}

.form__clear-btn,
.form__paste-btn {
    position: absolute;
    right: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--color-text-dim);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form__clear-btn svg,
.form__paste-btn svg {
    width: 16px;
    height: 16px;
}

.form__clear-btn:hover,
.form__paste-btn:hover {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--color-border);
}

.form__error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    min-height: 1.2em;
    transition: opacity var(--transition-fast);
    opacity: 0;
}

.form__error.visible {
    opacity: 1;
}

/* --- Toggle Switch --- */
.form__options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
}

.toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    user-select: none;
}

.toggle__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle__slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    border: 1.5px solid var(--color-border);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.toggle__slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: var(--color-text-muted);
    border-radius: 50%;
    transition: all var(--transition-base);
}

.toggle__input:checked + .toggle__slider {
    background: var(--color-primary-subtle);
    border-color: var(--color-primary);
}

.toggle__input:checked + .toggle__slider::before {
    transform: translateX(20px);
    background: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary-glow);
}

.toggle__label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-base);
}

.toggle__input:checked ~ .toggle__label {
    color: var(--color-text);
}

.toggle__icon {
    width: 16px;
    height: 16px;
}

.form__format-badge {
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    border: 1px solid rgba(255, 0, 51, 0.2);
    border-radius: var(--radius-full);
    letter-spacing: 0.04em;
    white-space: nowrap;
    transition: all var(--transition-base);
}

.form__format-wrapper {
    display: flex;
    align-items: center;
}

.form__format-badge[hidden] {
    display: none !important;
}

.form__select-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.form__select-wrapper[hidden] {
    display: none !important;
}

.form__select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: var(--color-bg-elevated);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 0.35rem 2rem 0.35rem 2.1rem;
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
    line-height: 1.4;
}

.form__select:hover:not(:disabled) {
    border-color: rgba(255, 0, 51, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.form__select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

.form__select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form__select option {
    background-color: #14141c;
    color: var(--color-text);
    padding: var(--space-xs) var(--space-sm);
}

.form__select-icon-left {
    position: absolute;
    left: 0.65rem;
    width: 14px;
    height: 14px;
    color: var(--color-primary);
    pointer-events: none;
    transition: color var(--transition-fast);
}

.form__select-arrow {
    position: absolute;
    right: 0.65rem;
    width: 12px;
    height: 12px;
    color: var(--color-text-muted);
    pointer-events: none;
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.form__select-wrapper:focus-within .form__select-arrow {
    color: var(--color-primary);
    transform: rotate(180deg);
}

/* --- Primary Button --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    border: none;
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 700;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    box-shadow: 0 4px 16px var(--color-primary-glow);
    letter-spacing: 0.04em;
}

.btn--primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn--primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px var(--color-primary-glow), var(--shadow-glow);
}

.btn--primary:hover:not(:disabled)::before {
    opacity: 1;
}

.btn--primary:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 8px var(--color-primary-glow);
}

.btn--primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn__icon {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.btn--primary:hover:not(:disabled) .btn__icon {
    transform: translateY(2px);
}

.btn__loader {
    display: none;
    align-items: center;
    gap: var(--space-sm);
}

.btn.loading .btn__text,
.btn.loading .btn__icon {
    display: none;
}

.btn.loading .btn__loader {
    display: flex;
}

/* --- Spinner --- */
.spinner {
    width: 20px;
    height: 20px;
    border: 2.5px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* --- Preview --- */
.preview {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    animation: fade-slide-up 0.3s ease-out;
}

.preview[hidden] {
    display: none;
}

.preview__thumb {
    width: 96px;
    height: 54px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.preview__info {
    flex: 1;
    min-width: 0;
}

.preview__title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    white-space: normal;
    word-break: break-word;
    overflow-wrap: anywhere;
    line-height: 1.45;
}

.preview__duration {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

@keyframes fade-slide-up {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Footer --- */
.footer {
    text-align: center;
    margin-top: var(--space-2xl);
    font-size: var(--font-size-xs);
    color: var(--color-text-dim);
}

/* --- Status Toast --- */
.toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    opacity: 0;
    transition: all var(--transition-slow);
    pointer-events: none;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.toast--success {
    background: rgba(0, 214, 143, 0.15);
    border: 1px solid rgba(0, 214, 143, 0.3);
    color: var(--color-success);
}

.toast--error {
    background: rgba(255, 61, 113, 0.15);
    border: 1px solid rgba(255, 61, 113, 0.3);
    color: var(--color-error);
}

/* --- Responsive --- */
@media (max-width: 560px) {
    .container {
        padding: var(--space-lg);
    }

    .card {
        padding: var(--space-xl);
        border-radius: var(--radius-lg);
    }

    .logo__text {
        font-size: var(--font-size-2xl);
    }

    .logo__icon {
        width: 40px;
        height: 40px;
    }

    .form__options {
        flex-direction: column;
        align-items: flex-start;
    }

    .bg-glow--1 {
        width: 300px;
        height: 300px;
    }

    .bg-glow--2 {
        width: 250px;
        height: 250px;
    }
}

@media (max-width: 360px) {
    .container {
        padding: var(--space-md);
    }

    .card {
        padding: var(--space-lg);
    }
}


.logo__image {
    width: 100px;
    height: auto;
}

@media (min-width: 561px) {
    .logo__image {
        width: 150px;
    }
}

@media (min-width: 768px) {
    .logo__image {
        width: 200px;
    }
}


/* Playlist item styles */
.playlist-item {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    padding: 0.75rem;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1.5px solid transparent;
    cursor: pointer;
    user-select: none;
    height: auto;
    min-height: fit-content;
    transition: all var(--transition-fast);
}

.playlist-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.playlist-item.selected,
.playlist-item:has(.playlist-radio:checked) {
    background: rgba(255, 0, 51, 0.08);
    border-color: rgba(255, 0, 51, 0.35);
}

.playlist-item__radio-wrapper {
    margin-top: 4px;
    flex-shrink: 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.playlist-radio {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
    margin: 0;
    pointer-events: none;
}

.playlist-radio__circle {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.playlist-radio__circle::after {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-primary);
    transform: scale(0);
    transition: transform var(--transition-fast);
}

.playlist-radio:checked + .playlist-radio__circle {
    border-color: var(--color-primary);
    box-shadow: 0 0 8px var(--color-primary-glow);
}

.playlist-radio:checked + .playlist-radio__circle::after {
    transform: scale(1);
}

.playlist-item__thumb {
    width: 80px;
    height: 48px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}

.playlist-item__info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.playlist-item__title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    white-space: normal !important;
    word-break: break-word !important;
    overflow-wrap: anywhere !important;
    text-overflow: clip !important;
    overflow: visible !important;
    line-height: 1.5;
    margin: 0;
}

.playlist-item__duration {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Downloaded item styles */
.playlist-item.downloaded {
    opacity: 0.55;
    filter: grayscale(0.5);
}

.playlist-item.downloaded:hover {
    opacity: 0.85;
    filter: grayscale(0.2);
}

.playlist-item.downloaded.selected,
.playlist-item.downloaded:has(.playlist-radio:checked) {
    opacity: 1;
    filter: none;
    background: rgba(255, 0, 51, 0.08);
    border-color: rgba(255, 0, 51, 0.35);
}

.playlist-item__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.15rem;
}

.playlist-item__date {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.playlist-item__badge-downloaded {
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-muted);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* --- Hidden Attribute Guard --- */
[hidden] {
    display: none !important;
}

/* --- Input With Right Action --- */
.form__input--with-action {
    padding-right: calc(var(--space-sm) + 42px);
}

/* --- Alerts (Login / Status) --- */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.alert--error {
    background: rgba(255, 61, 113, 0.12);
    border: 1px solid rgba(255, 61, 113, 0.35);
    color: var(--color-error);
}

.alert--info {
    background: rgba(0, 214, 143, 0.12);
    border: 1px solid rgba(0, 214, 143, 0.35);
    color: var(--color-success);
}

/* --- Login Options --- */
.login-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.link-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-family: var(--font-family);
    font-size: var(--font-size-xs);
    cursor: pointer;
    text-decoration: underline;
    padding: 2px 4px;
    transition: color var(--transition-fast);
}

.link-btn:hover {
    color: var(--color-text);
}

/* --- Download Fallback Banner --- */
.download-fallback {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background: rgba(0, 214, 143, 0.08);
    border: 1px solid rgba(0, 214, 143, 0.25);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    animation: fade-slide-up 0.25s ease-out;
}

.download-fallback__text {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    word-break: break-word;
    overflow-wrap: anywhere;
}

.download-fallback__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    width: 100%;
    padding: 0.65rem var(--space-md);
    border-radius: var(--radius-sm);
    background: rgba(0, 214, 143, 0.16);
    border: 1px solid rgba(0, 214, 143, 0.35);
    color: var(--color-success);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.download-fallback__btn:hover {
    background: rgba(0, 214, 143, 0.24);
}

.download-fallback__btn:active {
    transform: scale(0.99);
}

.download-fallback__btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* --- Footer Session Controls --- */
.footer__session {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.footer__user {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.footer__logout {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-full);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.footer__logout:hover {
    color: var(--color-text);
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
}