/* ===== CSS Variables – Light (default) ===== */
:root {
    --vh: 1vh;
    --app-bg: #F5F6F5;
    --text-color: #333333;
    --accent-color: #AEDFF7;
    --secondary-accent: #E8D5A3;
    --input-bg: #FFFFFF;
    --border-color: #DDDDDD;
    --placeholder-text: #888888;
    --icon-color: #333333;
    --error-color: #D9534F;
    --success-color: #5CB85C;
    --error-msg-bg: rgba(217,83,79,0.8);
    --error-msg-text: #FFFFFF;
    --spinner-color: var(--accent-color);
    --spinner-bg: rgba(0,0,0,0.1);
    --overlay-bg: rgba(51,51,51,0.6);
    --form-bg: #FFFFFF;
    --icon-bg: rgba(255,255,255,0.7);
    --indicator-bg: rgba(30,30,30,0.75);
    --indicator-text: #FFFFFF;
    --nav-bg-start: rgba(245,246,245,0.7);
    --nav-bg-end: rgba(245,246,245,0);
    --nav-hover-bg: rgba(174,223,247,0.2);
    --nav-icon: rgba(51,51,51,0.6);
    --nav-icon-hover: rgba(51,51,51,0.9);
    --disabled-bg: #E0E0E0;
    --disabled-text: #999999;
    --form-shadow: 0 2px 8px rgba(0,0,0,0.08);
    --input-focus-shadow: rgba(174,223,247,0.4);
    --placeholder-bg: #EEEEEE;
    --skeleton-base: #1a1a1a;
    --skeleton-shine: #2e2e2e;
    --action-btn-bg: rgba(0,0,0,0.45);
    --action-btn-color: #FFFFFF;
    --fav-active: #FF4081;
    --report-active: #FF8C00;
}

/* ===== Dark theme – auto (system) ===== */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --app-bg: #0d0d0d;
        --text-color: #E0E0E0;
        --form-bg: #1a1a1a;
        --input-bg: #252525;
        --border-color: #333333;
        --placeholder-text: #777777;
        --icon-color: #E0E0E0;
        --overlay-bg: rgba(0,0,0,0.75);
        --icon-bg: rgba(20,20,20,0.7);
        --nav-bg-start: rgba(13,13,13,0.85);
        --nav-bg-end: rgba(13,13,13,0);
        --nav-hover-bg: rgba(174,223,247,0.08);
        --nav-icon: rgba(224,224,224,0.6);
        --nav-icon-hover: rgba(224,224,224,0.9);
        --disabled-bg: #2a2a2a;
        --disabled-text: #555555;
        --form-shadow: 0 2px 12px rgba(0,0,0,0.4);
        --placeholder-bg: #1a1a1a;
        --spinner-bg: rgba(255,255,255,0.08);
        --indicator-bg: rgba(255,255,255,0.15);
    }
}

/* ===== Dark theme – manual override ===== */
[data-theme="dark"] {
    --app-bg: #0d0d0d;
    --text-color: #E0E0E0;
    --form-bg: #1a1a1a;
    --input-bg: #252525;
    --border-color: #333333;
    --placeholder-text: #777777;
    --icon-color: #E0E0E0;
    --overlay-bg: rgba(0,0,0,0.75);
    --icon-bg: rgba(20,20,20,0.7);
    --nav-bg-start: rgba(13,13,13,0.85);
    --nav-bg-end: rgba(13,13,13,0);
    --nav-hover-bg: rgba(174,223,247,0.08);
    --nav-icon: rgba(224,224,224,0.6);
    --nav-icon-hover: rgba(224,224,224,0.9);
    --disabled-bg: #2a2a2a;
    --disabled-text: #555555;
    --form-shadow: 0 2px 12px rgba(0,0,0,0.4);
    --placeholder-bg: #1a1a1a;
    --spinner-bg: rgba(255,255,255,0.08);
    --indicator-bg: rgba(255,255,255,0.15);
}

/* ===== Force light ===== */
[data-theme="light"] {
    --app-bg: #F5F6F5;
    --text-color: #333333;
    --form-bg: #FFFFFF;
    --input-bg: #FFFFFF;
    --border-color: #DDDDDD;
}

/* ===== Reset & base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { overscroll-behavior-y: contain; }
html, body { height: 100%; background-color: var(--app-bg); color: var(--text-color); }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-tap-highlight-color: transparent;
    overflow: hidden;
    position: fixed;
    width: 100%;
    top: 0; left: 0;
    overscroll-behavior-y: contain;
    touch-action: pan-y;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
}

/* ===== App container ===== */
#app-container {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100vh;
    height: calc(var(--vh, 1vh) * 100);
    background-color: var(--app-bg);
    margin: 0 auto;
    overflow: hidden;
}
@media (min-width: 601px) {
    #app-container {
        max-width: 450px;
        left: 50%;
        transform: translateX(-50%);
        border-left: 1px solid var(--border-color);
        border-right: 1px solid var(--border-color);
    }
}

/* ===== Swiper ===== */
.swiper { width: 100%; height: 100%; overflow: hidden; touch-action: pan-y; }
.swiper-wrapper { width: 100%; height: 100%; touch-action: pan-y; }
.swiper-slide {
    touch-action: pan-y;
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%; height: 100%;
    background-color: transparent;
    user-select: none;
}
.slide-content-container {
    width: 100%; height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: transparent;
    position: relative;
}

/* ===== Video slides ===== */
.video-container { cursor: pointer; width: 100%; height: 100%; }
.video-wrapper {
    width: 100%; height: 100%;
    position: relative;
    touch-action: auto;
    user-select: auto;
    display: flex;
    justify-content: center;
    align-items: center;
}
.video-wrapper iframe {
    width: 100%; height: 100%;
    border: none;
    display: block;
    pointer-events: none;
    background-color: transparent;
    max-width: 100%; max-height: 100%;
    object-fit: contain;
    opacity: 1;
    transition: opacity 0.3s ease-in;
}
.video-error-message {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--error-msg-bg);
    color: var(--error-msg-text);
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
    z-index: 7;
    display: none;
}
.video-wrapper.has-error .video-error-message { display: block; }
.video-wrapper.has-error iframe,
.video-wrapper.has-error .unmute-icon { display: none; }

/* Mute icon */
.video-icon {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 64px; height: 64px;
    background-color: var(--icon-bg);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    z-index: 5;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    visibility: hidden;
    pointer-events: none;
}
.video-icon.visible { opacity: 0.85; visibility: visible; }
.video-icon svg { width: 32px; height: 32px; fill: var(--icon-color); }

/* ===== Loading skeleton ===== */
.video-wrapper.is-loading::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        var(--skeleton-base) 0%,
        var(--skeleton-shine) 50%,
        var(--skeleton-base) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    z-index: 3;
    pointer-events: none;
}
@keyframes skeleton-shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position:  200% 0; }
}

/* ===== Placeholder slides ===== */
.placeholder-container {
    color: var(--placeholder-text);
    text-align: center;
    padding: 20px;
    background: var(--placeholder-bg);
    border-radius: 8px;
}

/* ===== Form slides ===== */
.add-video-container {
    touch-action: auto;
    user-select: auto;
    padding: 20px;
    flex-direction: column;
    width: 100%; height: 100%;
}
.url-form {
    width: 100%;
    max-width: 400px;
    padding: 25px;
    background: var(--form-bg);
    border-radius: 12px;
    box-shadow: var(--form-shadow);
    display: flex;
    flex-direction: column;
    gap: 15px;
    border: 1px solid var(--border-color);
}
.form-title { margin: 0 0 5px; font-size: 20px; font-weight: 600; text-align: center; color: var(--text-color); }
.form-description { font-size: 13px; color: var(--placeholder-text); text-align: center; margin-bottom: 15px; line-height: 1.4; }
.url-input {
    width: 100%;
    padding: 12px 15px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 16px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    touch-action: auto;
    user-select: text;
}
.url-input:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px var(--input-focus-shadow); }
.url-input::placeholder { color: var(--placeholder-text); opacity: 1; }
.submit-button {
    width: 100%;
    padding: 12px;
    background: var(--accent-color);
    border: none;
    border-radius: 8px;
    color: #FFFFFF;
    font-size: 16px; font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
}
.submit-button:hover:not(:disabled) { background-color: #9ACCE8; }
.submit-button:active:not(:disabled) { transform: scale(0.98); }
.submit-button:disabled { background-color: var(--disabled-bg); color: var(--disabled-text); cursor: not-allowed; opacity: 0.7; }
.status-message {
    margin-top: 5px;
    text-align: center;
    font-size: 14px;
    min-height: 20px;
    transition: color 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    color: var(--text-color);
}
.status-message.visible { opacity: 1; }
.status-message.success { color: var(--success-color); }
.status-message.error   { color: var(--error-color); }

/* ===== Swipe direction indicators ===== */
.swipe-indicator {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 12px;
    background: var(--indicator-bg);
    border-radius: 15px;
    color: var(--indicator-text);
    font-size: 13px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
    z-index: 1000;
    white-space: nowrap;
    visibility: hidden;
}
.swipe-indicator.up   { bottom: 20px; }
.swipe-indicator.down { top: 20px; }
.swipe-indicator.visible { opacity: 1; visibility: visible; transition-delay: 0s; }

/* ===== Progress indicator (top-left) ===== */
#progress-indicator {
    position: absolute;
    top: 14px; left: 14px;
    z-index: 950;
    background: rgba(0,0,0,0.45);
    color: #fff;
    font-size: 12px; font-weight: 500;
    padding: 4px 10px;
    border-radius: 12px;
    backdrop-filter: blur(4px);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    white-space: nowrap;
}
#progress-indicator.visible { opacity: 1; }

/* ===== Theme toggle (top-right) ===== */
#theme-toggle {
    position: absolute;
    top: 10px; right: 12px;
    z-index: 960;
    width: 36px; height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(0,0,0,0.4);
    color: #fff;
    font-size: 17px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transition: background 0.2s ease;
    padding: 0; line-height: 1;
}
#theme-toggle:hover { background: rgba(0,0,0,0.6); }

/* ===== Right-side action bar ===== */
#action-bar {
    position: absolute;
    right: 12px; bottom: 90px;
    z-index: 950;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0s linear 0.35s;
}
#action-bar.visible {
    opacity: 1;
    visibility: visible;
    transition-delay: 0s;
}
.action-btn {
    width: 46px; height: 46px;
    border-radius: 50%;
    border: none;
    background: var(--action-btn-bg);
    color: var(--action-btn-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(6px);
    transition: background 0.2s ease, transform 0.1s ease, color 0.2s ease;
    flex-shrink: 0;
    padding: 0;
}
.action-btn:active { transform: scale(0.88); }
.action-btn svg { width: 22px; height: 22px; fill: currentColor; pointer-events: none; }
.action-btn.favorited { color: var(--fav-active); }

/* ===== Ad slides ===== */
.swiper-slide[data-slide-type="ad"] { background-color: var(--secondary-accent); }
.swiper-slide[data-slide-type="ad"] .slide-content-container { border: none; position: relative; overflow: hidden; }
.swiper-slide[data-slide-type="ad"] .video-wrapper { z-index: 2; position: relative; background-color: transparent; }
.swiper-slide[data-slide-type="ad"] .video-wrapper iframe { background-color: transparent; }

/* Sponsored badge (replaces the old full-screen 'Ad' watermark) */
.sponsored-badge {
    position: absolute;
    top: 12px; left: 12px;
    z-index: 10;
    background: rgba(0,0,0,0.58);
    color: rgba(255,255,255,0.9);
    font-size: 10px; font-weight: 700;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    pointer-events: none;
    backdrop-filter: blur(3px);
    border: 1px solid rgba(255,255,255,0.15);
}

/* ===== Swipe hint (first-visit overlay) ===== */
#swipe-hint {
    position: absolute;
    bottom: 22%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}
#swipe-hint.visible { opacity: 1; }
.swipe-hint-arrow {
    width: 44px; height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.18);
    border: 2px solid rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce-up 1.2s ease-in-out infinite;
}
.swipe-hint-arrow svg { width: 24px; height: 24px; fill: white; }
.swipe-hint-text {
    color: rgba(255,255,255,0.85);
    font-size: 13px; font-weight: 500;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    white-space: nowrap;
}
@keyframes bounce-up {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-9px); }
}

/* ===== Toast notification ===== */
#toast {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(16px);
    z-index: 2000;
    background: rgba(0,0,0,0.78);
    color: #fff;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s ease, transform 0.28s ease;
    backdrop-filter: blur(4px);
}
#toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ===== Report confirmation dialog ===== */
#report-dialog {
    position: absolute;
    inset: 0;
    z-index: 2000;
    background: rgba(0,0,0,0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}
#report-dialog.visible { opacity: 1; pointer-events: auto; }
.report-dialog-box {
    background: var(--form-bg);
    border-radius: 14px;
    padding: 26px 22px;
    max-width: 290px;
    width: 90%;
    text-align: center;
    box-shadow: 0 6px 24px rgba(0,0,0,0.35);
}
.report-dialog-box h3 { font-size: 16px; margin-bottom: 8px; color: var(--text-color); }
.report-dialog-box p  { font-size: 13px; color: var(--placeholder-text); margin-bottom: 20px; line-height: 1.4; }
.report-dialog-actions { display: flex; gap: 10px; justify-content: center; }
.report-dialog-actions button {
    padding: 10px 22px;
    border: none;
    border-radius: 8px;
    font-size: 14px; font-weight: 500;
    cursor: pointer;
}
.report-cancel  { background: var(--border-color); color: var(--text-color); }
.report-confirm { background: var(--error-color); color: #fff; }

/* ===== Global loading overlay ===== */
.loading-overlay {
    position: absolute;
    inset: 0;
    background: var(--overlay-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1050;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.loading-overlay.active { opacity: 1; pointer-events: auto; }
.loading-spinner {
    width: 35px; height: 35px;
    border: 3px solid var(--spinner-bg);
    border-top-color: var(--spinner-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Desktop navigation ===== */
.desktop-nav {
    display: none;
    position: fixed;
    left: 0;
    width: 100%; height: 15%;
    z-index: 900;
    cursor: pointer;
    transition: background-color 0.2s ease;
}
.desktop-nav.prev { top: 0;    background: linear-gradient(to bottom, var(--nav-bg-start), var(--nav-bg-end)); }
.desktop-nav.next { bottom: 0; background: linear-gradient(to top,   var(--nav-bg-start), var(--nav-bg-end)); }
.desktop-nav:hover { background-color: var(--nav-hover-bg); }
.desktop-nav svg {
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: 40px; height: 40px;
    fill: var(--nav-icon);
    transition: fill 0.2s ease, transform 0.2s ease;
}
.desktop-nav:hover svg { fill: var(--nav-icon-hover); }
.desktop-nav.prev:hover svg { transform: translate(-50%, -50%) scale(1.1) translateY(-2px); }
.desktop-nav.next:hover svg { transform: translate(-50%, -50%) scale(1.1) translateY(2px); }

/* ===== Desktop breakpoint ===== */
@media (min-width: 769px) {
    .swipe-indicator { display: none; }
    .desktop-nav { display: block; }
    #action-bar { bottom: calc(15% + 90px); }
    .swiper-slide[data-slide-type="add_form"],
    .url-form, .url-input, .submit-button,
    .video-container, .video-wrapper, .video-icon,
    .action-btn { pointer-events: auto; }
    .video-wrapper iframe[src*="youtube.com"] { pointer-events: none; }
}