/* =====================================================
   style.css — Green Screen Remover
   Dark theme UI
===================================================== */

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

body {
    background-color: #0d0d0d;
    color: #e0e0e0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 920px;
    margin: 0 auto;
}

/* ---- Header ---- */
header {
    text-align: center;
    padding: 30px 0 24px;
}

header h1 {
    font-size: 2rem;
    color: #00ff88;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

header p {
    color: #666;
    font-size: 0.9rem;
}

/* ---- Upload Section: two cards side by side ---- */
.upload-section {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.upload-card {
    flex: 1;
    min-width: 200px;
    background: #141414;
    border: 2px dashed #2a2a2a;
    border-radius: 14px;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.upload-card:hover {
    border-color: #00ff88;
    background: #0d1a10;
}

/* The label IS the clickable area */
.upload-card label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px 20px;
    cursor: pointer;
    gap: 8px;
    text-align: center;
}

.upload-icon {
    font-size: 2.2rem;
}

.upload-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #ccc;
}

.upload-sub {
    font-size: 0.78rem;
    color: #555;
}

/* ---- Controls Section ---- */
.controls-section {
    background: #111;
    border: 1px solid #1e1e1e;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
}

.control-row {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.control-group {
    flex: 1;
    min-width: 170px;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.control-group label {
    font-size: 0.83rem;
    font-weight: 600;
    color: #999;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Green pill badge showing the current slider value */
.val-badge {
    background: #00ff8820;
    color: #00ff88;
    border: 1px solid #00ff8840;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 700;
    min-width: 30px;
    text-align: center;
}

/* Custom range slider styling */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 5px;
    background: #2a2a2a;
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 17px;
    height: 17px;
    background: #00ff88;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

/* Firefox slider thumb */
input[type="range"]::-moz-range-thumb {
    width: 17px;
    height: 17px;
    background: #00ff88;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* Color picker */
.color-input {
    width: 100%;
    height: 40px;
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    cursor: pointer;
    background: #1a1a1a;
    padding: 3px;
}

/* Small helper text below each control */
.hint {
    font-size: 0.71rem;
    color: #444;
    line-height: 1.4;
}

/* ---- Preview Section ---- */
.preview-section {
    margin-bottom: 18px;
}

.preview-label {
    font-size: 0.75rem;
    color: #444;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 10px;
    font-weight: 600;
}

/*
  Checkerboard pattern on the wrapper shows through transparent areas
  of the canvas — this visually indicates what is "transparent"
*/
.canvas-wrapper {
    position: relative;
    background-color: #111;
    background-image:
        linear-gradient(45deg, #1a1a1a 25%, transparent 25%),
        linear-gradient(-45deg, #1a1a1a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #1a1a1a 75%),
        linear-gradient(-45deg, transparent 75%, #1a1a1a 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid #1e1e1e;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#outputCanvas {
    display: none; /* Hidden until a video is loaded */
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

/* Placeholder shown before video is loaded */
.no-video-msg {
    text-align: center;
    color: #333;
    padding: 60px 20px;
    pointer-events: none;
}

.no-video-msg div {
    font-size: 3rem;
    margin-bottom: 12px;
}

.no-video-msg p {
    font-size: 0.9rem;
}

/* ---- Action Buttons ---- */
.actions-section {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.btn {
    flex: 1;
    padding: 13px 28px;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s, opacity 0.2s;
    letter-spacing: 0.3px;
}

.btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.btn:not(:disabled):active {
    transform: scale(0.97);
}

.btn-play {
    background: #00ff88;
    color: #000;
}

.btn-play:not(:disabled):hover {
    background: #00e07a;
}

.btn-export {
    background: #2266ff;
    color: #fff;
}

.btn-export:not(:disabled):hover {
    background: #1a55ee;
}

/* ---- Export Status Message ---- */
.export-status {
    text-align: center;
    font-size: 0.88rem;
    color: #00ff88;
    min-height: 26px;
    padding-bottom: 30px;
}

/* ---- Responsive for small screens ---- */
@media (max-width: 600px) {
    header h1 {
        font-size: 1.5rem;
    }

    .control-group {
        min-width: 140px;
    }

    .btn {
        padding: 11px 16px;
        font-size: 0.88rem;
    }
}