/* ==========================================
   ALPHABET CONSTRUCTOR - STYLES
   ========================================== */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a24;
    --bg-hover: #252532;
    --border-color: #2a2a3a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #22c55e;
    --success-hover: #16a34a;
    --warning: #f59e0b;
    --danger: #ef4444;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ==========================================
   HEADER
   ========================================== */

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 65px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
}

.back-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.title-input {
    background: transparent;
    border: 2px solid transparent;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 8px;
    min-width: 300px;
    transition: all 0.2s;
}

.title-input:hover {
    background: var(--bg-card);
}

.title-input:focus {
    outline: none;
    background: var(--bg-card);
    border-color: var(--accent);
}

.title-input::placeholder {
    color: var(--text-secondary);
}

.header-center {
    display: flex;
    align-items: center;
    gap: 12px;
}

.size-toggle {
    display: flex;
    background: var(--bg-card);
    border-radius: 8px;
    padding: 4px;
    border: 1px solid var(--border-color);
}

.size-btn {
    padding: 8px 24px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.size-btn.active {
    background: var(--accent);
    color: white;
}

.size-btn:hover:not(.active) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-ghost {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: var(--success-hover);
}

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

/* ==========================================
   MAIN LAYOUT
   ========================================== */

.main-container {
    display: flex;
    height: calc(100vh - 65px);
}

/* ==========================================
   SIDEBAR
   ========================================== */

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
    overflow-y: auto;
}

.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.sidebar-title i {
    font-size: 12px;
}

.refresh-btn {
    margin-left: auto;
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.refresh-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* Cover Box */
.cover-box {
    aspect-ratio: 210/297;
    background: var(--bg-card);
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.cover-box:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.cover-box.has-image {
    border-style: solid;
    border-color: var(--success);
}

.cover-box img {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cover-box.has-image .cover-placeholder {
    display: none;
}

.cover-placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.cover-placeholder i {
    font-size: 32px;
    margin-bottom: 8px;
    display: block;
}

.cover-placeholder span {
    font-size: 12px;
}

.cover-size {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 8px;
}

/* Search Input */
.search-input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    margin-bottom: 12px;
    transition: all 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent);
}

.search-input::placeholder {
    color: var(--text-muted);
}

/* History List */
.history-list {
    flex: 1;
    overflow-y: auto;
    max-height: calc(100vh - 400px);
}

.history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-card);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.history-item:hover {
    background: var(--bg-hover);
}

.history-item-info {
    flex: 1;
    min-width: 0;
}

.history-item-title {
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.history-item-date {
    font-size: 11px;
    color: var(--text-muted);
}

.history-item-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.history-item:hover .history-item-actions {
    opacity: 1;
}

.history-item-actions button {
    width: 28px;
    height: 28px;
    border: none;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 12px;
}

.history-item-actions button:hover {
    background: var(--accent);
    color: white;
}

/* ==========================================
   CONTENT AREA
   ========================================== */

.content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    background: var(--bg-primary);
}

.content-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.content-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
}

.content-title i {
    color: var(--accent);
}

.page-count {
    color: var(--text-secondary);
    font-weight: 400;
}

/* ==========================================
   DROP ZONE
   ========================================== */

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    margin-bottom: 24px;
    transition: all 0.3s;
    background: var(--bg-card);
    cursor: pointer;
}

.drop-zone:hover {
    border-color: var(--accent);
}

.drop-zone.drag-over {
    border-color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
    transform: scale(1.01);
}

.drop-zone-icon {
    font-size: 48px;
    color: var(--accent);
    margin-bottom: 16px;
}

.drop-zone-text {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 500;
}

.drop-zone-hint {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==========================================
   LETTERS GRID
   ========================================== */

.letters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
}

.letter-box {
    aspect-ratio: 1;
    background: var(--bg-card);
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
}

.letter-box:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.letter-box.has-image {
    border-style: solid;
    border-color: var(--success);
}

.letter-box.has-image:hover {
    border-color: var(--accent);
}

.letter-box img {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.letter-box.has-image .letter-placeholder {
    display: none;
}

.letter-number {
    position: absolute;
    top: 6px;
    left: 6px;
    background: var(--accent);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    z-index: 2;
}

.letter-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.letter-placeholder i {
    font-size: 24px;
    margin-bottom: 4px;
    display: block;
}

.letter-placeholder span {
    font-size: 10px;
    text-transform: uppercase;
}

/* Remove Button */
.letter-box .remove-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 24px;
    height: 24px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    z-index: 3;
    transition: all 0.2s;
}

.letter-box.has-image:hover .remove-btn {
    display: flex;
}

.letter-box .remove-btn:hover {
    transform: scale(1.1);
}

/* ==========================================
   HINT BAR
   ========================================== */

.hint-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 16px;
    margin-top: 24px;
    background: var(--bg-card);
    border-radius: 10px;
    font-size: 13px;
    color: var(--text-secondary);
}

.hint-bar i {
    color: var(--warning);
}

/* ==========================================
   MODALS
   ========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 32px;
    max-width: 500px;
    width: 90%;
    position: relative;
    border: 1px solid var(--border-color);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    background: var(--bg-card);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.modal-close:hover {
    background: var(--danger);
    color: white;
}

/* Progress Modal */
.progress-modal {
    text-align: center;
}

.progress-modal h3 {
    margin-bottom: 24px;
    font-size: 18px;
}

.progress-modal h3 i {
    color: var(--accent);
    margin-right: 8px;
}

.progress-bar-container {
    height: 8px;
    background: var(--bg-card);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--success));
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.progress-percent {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
}

/* ==========================================
   DANCING MAN ANIMATION
   ========================================== */

.dancing-man-container {
    width: 120px;
    height: 150px;
    margin: 0 auto 24px;
    position: relative;
}

.dancing-man {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: dance 0.5s ease-in-out infinite alternate;
}

.dancing-man .head {
    width: 30px;
    height: 30px;
    background: var(--accent);
    border-radius: 50%;
    margin: 0 auto 5px;
    animation: headBob 0.25s ease-in-out infinite alternate;
}

.dancing-man .body {
    width: 8px;
    height: 40px;
    background: var(--accent);
    margin: 0 auto;
    border-radius: 4px;
}

.dancing-man .arm {
    position: absolute;
    width: 8px;
    height: 35px;
    background: var(--accent);
    border-radius: 4px;
    top: 35px;
}

.dancing-man .arm.left {
    left: 25px;
    transform-origin: top center;
    animation: armLeft 0.25s ease-in-out infinite alternate;
}

.dancing-man .arm.right {
    right: 25px;
    transform-origin: top center;
    animation: armRight 0.25s ease-in-out infinite alternate;
}

.dancing-man .leg {
    position: absolute;
    width: 8px;
    height: 40px;
    background: var(--accent);
    border-radius: 4px;
    top: 75px;
}

.dancing-man .leg.left {
    left: 38px;
    transform-origin: top center;
    animation: legLeft 0.25s ease-in-out infinite alternate;
}

.dancing-man .leg.right {
    right: 38px;
    transform-origin: top center;
    animation: legRight 0.25s ease-in-out infinite alternate;
}

@keyframes dance {
    from { transform: translate(-50%, -50%) translateY(0); }
    to { transform: translate(-50%, -50%) translateY(-10px); }
}

@keyframes headBob {
    from { transform: rotate(-5deg); }
    to { transform: rotate(5deg); }
}

@keyframes armLeft {
    from { transform: rotate(-45deg); }
    to { transform: rotate(45deg); }
}

@keyframes armRight {
    from { transform: rotate(45deg); }
    to { transform: rotate(-45deg); }
}

@keyframes legLeft {
    from { transform: rotate(20deg); }
    to { transform: rotate(-20deg); }
}

@keyframes legRight {
    from { transform: rotate(-20deg); }
    to { transform: rotate(20deg); }
}

/* Confetti */
.confetti-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
}

/* ==========================================
   RESULT MODAL
   ========================================== */

.result-modal {
    text-align: center;
}

.result-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 28px;
}

.result-icon.success {
    background: rgba(34, 197, 94, 0.2);
    color: var(--success);
}

.result-modal h3 {
    margin-bottom: 24px;
    font-size: 20px;
}

.result-links {
    text-align: left;
    margin-bottom: 24px;
}

.result-link-group {
    margin-bottom: 16px;
}

.result-link-group label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.link-row {
    display: flex;
    gap: 8px;
}

.link-row input {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
}

.copy-btn,
.open-btn {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    text-decoration: none;
}

.copy-btn:hover,
.open-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 900px) {
    .sidebar {
        width: 220px;
    }
    
    .letters-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
}

@media (max-width: 700px) {
    .header {
        flex-wrap: wrap;
        height: auto;
        padding: 12px;
        gap: 12px;
    }
    
    .header-left,
    .header-center,
    .header-right {
        width: 100%;
        justify-content: center;
    }
    
    .title-input {
        min-width: auto;
        width: 100%;
    }
    
    .main-container {
        flex-direction: column;
        height: auto;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .history-list {
        max-height: 200px;
    }
    
    .hint-bar {
        flex-direction: column;
        gap: 8px;
    }
}