/* ==========================================================
   === TOOL GHÉP ẢNH FREE V1 — HACKER GREEN THEME ===
   ========================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Background */
    --bg: #0a0e0a;
    --bg-panel: #0f140f;
    --bg-input: #0d120d;
    --bg-hover: #1a241a;

    /* Border */
    --border: #1a3a1a;
    --border-light: #2a4a2a;
    --border-bright: #00ff41;

    /* Text */
    --text: #c8e8c8;
    --text-muted: #6a8a6a;
    --text-dim: #4a5a4a;

    /* Accent - Hacker Green */
    --green: #00ff41;
    --green-dim: #00cc33;
    --green-dark: #00802a;
    --green-glow: rgba(0, 255, 65, 0.3);

    /* Status */
    --red: #ff3344;
    --yellow: #ffcc00;

    /* Sizes */
    --radius: 4px;
    --radius-sm: 3px;

    --font: 'Consolas', 'Monaco', 'Courier New', monospace;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 13px;
    line-height: 1.5;
    min-height: 100vh;
    background-image:
        linear-gradient(rgba(0, 255, 65, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 255, 65, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* ============================================================
   === HEADER ===
   ============================================================ */
.header {
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    letter-spacing: 2px;
}

.logo-bracket {
    color: var(--green);
    text-shadow: 0 0 10px var(--green-glow);
    font-weight: bold;
}

.logo-text {
    color: var(--green);
    text-shadow: 0 0 10px var(--green-glow);
    font-weight: bold;
}

.logo-version {
    color: var(--text-muted);
    font-size: 12px;
    margin-left: 4px;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 11px;
    color: var(--green);
    background: var(--bg-input);
    letter-spacing: 1px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
    animation: pulse-dot 1.5s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ============================================================
   === MAIN LAYOUT ===
   ============================================================ */
.main {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.col-left,
.col-right {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* ============================================================
   === PANEL ===
   ============================================================ */
.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    position: relative;
}

.panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--green);
    box-shadow: 0 0 10px var(--green-glow);
    border-radius: var(--radius) 0 0 var(--radius);
}

.panel-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--green);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
    text-shadow: 0 0 8px var(--green-glow);
}

.step-num {
    color: var(--green);
    font-weight: bold;
    font-size: 14px;
    padding: 2px 8px;
    border: 1px solid var(--green);
    border-radius: var(--radius-sm);
    text-shadow: none;
}

/* ============================================================
   === FRAME GRID ===
   ============================================================ */
.frame-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
}

.frame-card {
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    position: relative;
}

.frame-card:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}

.frame-card.selected {
    border-color: var(--green);
    box-shadow: 0 0 20px var(--green-glow);
}

.frame-card.selected::after {
    content: '✓';
    position: absolute;
    top: 8px;
    right: 8px;
    width: 22px;
    height: 22px;
    background: var(--green);
    color: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

.frame-preview {
    width: 100%;
    height: 100px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.frame-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.frame-name {
    font-size: 12px;
    color: var(--text);
    font-weight: bold;
    margin-bottom: 4px;
}

.frame-meta {
    font-size: 10px;
    color: var(--text-muted);
}

.frame-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 11px;
    flex-wrap: wrap;
}

.info-label {
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-value {
    color: var(--green);
    font-weight: bold;
}

.info-sep {
    color: var(--text-dim);
}

/* ============================================================
   === UPLOAD COUNTER ===
   ============================================================ */
.upload-counter {
    display: flex;
    gap: 12px;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    font-size: 12px;
    color: var(--text-muted);
    align-items: center;
    flex-wrap: wrap;
}

.upload-counter strong {
    color: var(--green);
    font-size: 14px;
}

.counter-sep {
    color: var(--text-dim);
}

/* ============================================================
   === DROPZONE ===
   ============================================================ */
.dropzone {
    border: 2px dashed var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-input);
    transition: all 0.2s;
    margin-bottom: 12px;
    cursor: pointer;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--green);
    background: var(--bg-hover);
    box-shadow: inset 0 0 20px var(--green-glow);
}

.dropzone-inner {
    padding: 32px 20px;
    text-align: center;
    cursor: pointer;
}

.dropzone-icon {
    font-size: 32px;
    margin-bottom: 8px;
    opacity: 0.7;
}

.dropzone-text {
    font-size: 13px;
    color: var(--green);
    font-weight: bold;
    letter-spacing: 2px;
    margin-bottom: 6px;
    text-shadow: 0 0 8px var(--green-glow);
}

.dropzone-hint {
    font-size: 10px;
    color: var(--text-muted);
}

/* ============================================================
   === IMAGE GRID ===
   ============================================================ */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
    margin-bottom: 12px;
    min-height: 0;
}

.image-item {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.15s;
}

.image-item:hover {
    border-color: var(--green);
}

.image-item.selected {
    border: 2px solid var(--green);
    box-shadow: 0 0 15px var(--green-glow);
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.image-index {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green);
    color: var(--bg);
    border-radius: 50%;
    font-size: 11px;
    font-weight: bold;
    z-index: 2;
    box-shadow: 0 0 8px var(--green-glow);
}

.image-checkbox {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    border: 2px solid var(--green);
    border-radius: 3px;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--green);
    font-size: 14px;
    font-weight: bold;
    transition: all 0.15s;
}

.image-item.selected .image-checkbox {
    background: var(--green);
    color: var(--bg);
}

.image-remove {
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--red);
    color: white;
    border: none;
    border-radius: 3px;
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
    z-index: 3;
}

.image-item:hover .image-remove {
    opacity: 1;
}

.image-remove:hover {
    background: #cc2233;
}

.image-item.dragging {
    opacity: 0.4;
}

/* ============================================================
   === BUTTONS ===
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    background: transparent;
    border: 1px solid var(--green);
    color: var(--green);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font);
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.15s;
    text-shadow: 0 0 5px var(--green-glow);
}

.btn:hover:not(:disabled) {
    background: rgba(0, 255, 65, 0.1);
    box-shadow: 0 0 15px var(--green-glow);
}

.btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    text-shadow: none;
}

.btn-primary {
    background: var(--green);
    color: var(--bg);
    font-weight: bold;
    text-shadow: none;
}

.btn-primary:hover:not(:disabled) {
    background: #33ff66;
    box-shadow: 0 0 25px var(--green-glow);
}

.btn-danger {
    border-color: var(--red);
    color: var(--red);
    text-shadow: 0 0 5px rgba(255, 51, 68, 0.5);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(255, 51, 68, 0.1);
    box-shadow: 0 0 15px rgba(255, 51, 68, 0.3);
}

.btn-large {
    padding: 16px 24px;
    font-size: 14px;
    letter-spacing: 3px;
    width: 100%;
}

/* ============================================================
   === UPLOAD ACTIONS ===
   ============================================================ */
.upload-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.upload-actions .btn {
    flex: 1;
    min-width: 140px;
    font-size: 11px;
}

/* ============================================================
   === PROCESSING ===
   ============================================================ */
.processing-status {
    margin-top: 16px;
    padding: 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.processing-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--green);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    box-shadow: 0 0 15px var(--green-glow);
}

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

.processing-text {
    color: var(--green);
    font-size: 12px;
    letter-spacing: 1px;
    text-shadow: 0 0 8px var(--green-glow);
}

/* ============================================================
   === RESULT ===
   ============================================================ */
.result-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.result-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.result-preview {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: 12px;
    text-align: center;
}

.result-preview img {
    width: 100%;
    height: auto;
    display: block;
}

.result-actions {
    display: flex;
    gap: 8px;
}

.result-actions .btn {
    flex: 1;
}

.result-warn {
    margin-top: 12px;
    padding: 8px 12px;
    background: rgba(255, 204, 0, 0.08);
    border-left: 3px solid var(--yellow);
    border-radius: var(--radius-sm);
    font-size: 11px;
    color: var(--yellow);
}

/* ============================================================
   === INFO PANEL ===
   ============================================================ */
.info-panel::before {
    background: var(--text-muted);
    box-shadow: none;
}

.info-title {
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 2px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.info-list {
    list-style: none;
    counter-reset: info-counter;
    padding: 0;
}

.info-list li {
    counter-increment: info-counter;
    padding: 6px 0 6px 28px;
    font-size: 12px;
    color: var(--text-muted);
    position: relative;
}

.info-list li::before {
    content: counter(info-counter) ".";
    position: absolute;
    left: 0;
    color: var(--green);
    font-weight: bold;
}

.info-list strong {
    color: var(--green);
}

/* ============================================================
   === FOOTER ===
   ============================================================ */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-dim);
    font-size: 11px;
    letter-spacing: 2px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.terminal-cursor {
    color: var(--green);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* ============================================================
   === UTILS ===
   ============================================================ */
.text-center { text-align: center; }
.text-dim { color: var(--text-dim); }
.mt-16 { margin-top: 16px; }

/* ============================================================
   === SCROLLBAR ===
   ============================================================ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--green-dark);
}