/* ====================================================
   1. GLOBAL & THEME VARIABLES
   ==================================================== */
:root {
    --bg-gradient: radial-gradient(circle at top, #1e1b4b 0%, #0f172a 60%, #080d1a 100%);
    --card-bg: rgba(30, 41, 59, 0.6);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --secondary-bg: rgba(255, 255, 255, 0.05);
    --secondary-hover: rgba(255, 255, 255, 0.12);
    --radius-lg: 24px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', 'Prompt', system-ui, -apple-system, sans-serif;
}

body {
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    line-height: 1.6;
}

/* ====================================================
   2. CONTAINER & CARD LAYOUT
   ==================================================== */
.container {
    width: 100%;
    max-width: 760px;
}

.header {
    margin-bottom: 24px;
    text-align: center;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    gap: 12px;
}

.logo {
    font-size: 1.9rem;
    font-weight: 800;
    background: linear-gradient(135deg, #a5b4fc 0%, #38bdf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.92rem;
    font-weight: 400;
    text-align: left;
}

.lang-btn {
    background: var(--secondary-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.lang-btn:hover {
    background: var(--secondary-hover);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

.main-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ====================================================
   3. INPUT SECTION & BUTTONS
   ==================================================== */
.input-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.text-input {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    resize: vertical;
    outline: none;
    transition: var(--transition);
}

.text-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 4px var(--accent-glow);
    background: rgba(15, 23, 42, 0.85);
}

.text-input::placeholder {
    color: #475569;
}

.alert-box {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.button-group {
    display: flex;
    gap: 12px;
    margin-top: 6px;
}

.btn {
    flex: 1;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

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

.btn-secondary:hover {
    background: var(--secondary-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.divider {
    border: 0;
    height: 1px;
    background: var(--card-border);
    margin: 28px 0;
}

/* ====================================================
   4. EXTRACTED IMAGE SECTION
   ==================================================== */
.extracted-section {
    margin-top: 24px;
    background: rgba(15, 23, 42, 0.4);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
}

.result-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    font-weight: 600;
}

.image-preview-container {
    text-align: center;
    margin-bottom: 16px;
}

.image-preview {
    max-height: 220px;
    border-radius: var(--radius-sm);
    object-fit: contain;
    border: 1px solid var(--card-border);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

/* ====================================================
   5. RESULT & PALETTE DISPLAY (GRID 5 COLUMNS)
   ==================================================== */
.result-section {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.emotion-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(15, 23, 42, 0.5);
    padding: 18px 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--card-border);
}

.emotion-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.highlight-emotion {
    color: #38bdf8;
    font-weight: 800;
    letter-spacing: 0.5px;
    text-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

.confidence-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.section-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 500;
}

/* จัดการแท่งสีให้เป็นแนวนอน 5 คอลัมน์ */
.palette-display {
    display: grid;
    grid-template-columns: repeat(5, 1fr) !important;
    gap: 12px;
}

.color-swatch {
    height: 90px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 8px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.15);
    position: relative;
    overflow: hidden;
}

.color-swatch:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.5);
    z-index: 2;
}

.color-swatch span {
    font-size: 0.72rem;
    font-weight: 700;
    color: #ffffff;
    background: rgba(15, 23, 42, 0.75);
    padding: 3px 8px;
    border-radius: 6px;
    backdrop-filter: blur(6px);
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ====================================================
   6. AI DESIGN ADVISORY BOX
   ==================================================== */
.advisory-section {
    background: rgba(99, 102, 241, 0.06);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    padding: 20px 24px;
}

.advisory-section h4 {
    color: #a5b4fc;
    font-size: 0.95rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.advisory-section p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.advisory-section p:last-child {
    margin-bottom: 0;
}

.advisory-section p strong {
    color: var(--text-primary);
}

/* Responsive Layout */
@media (max-width: 640px) {
    .main-card {
        padding: 20px;
    }
    .button-group {
        flex-direction: column;
    }
    .palette-display {
        grid-template-columns: repeat(3, 1fr) !important;
    }
    .emotion-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
}