/* ============================================================
   Advanced Skin Analysis – Stylesheet
   Design: Refined medical-tech aesthetic
   Version: 3.0.0
   ============================================================ */

/* ── Custom Properties ─────────────────────────────────────── */
.kda-skin-analyzer {
    --kda-primary:        #c9a96e;    /* warm gold */
    --kda-primary-light:  #e8d5af;
    --kda-accent:         #7c5cbf;    /* deep violet */
    --kda-accent-light:   #b49ee0;
    --kda-surface:        #ffffff;
    --kda-surface-2:      #f8f6f2;
    --kda-surface-3:      #f0ece4;
    --kda-border:         #e5ddd0;
    --kda-text:           #2c2417;
    --kda-text-2:         #6b5e4a;
    --kda-text-3:         #9e9080;
    --kda-success:        #2d8c5e;
    --kda-warning:        #b25c00;
    --kda-error:          #b53030;
    --kda-shadow:         0 4px 24px rgba(44, 36, 23, 0.10);
    --kda-shadow-lg:      0 12px 40px rgba(44, 36, 23, 0.15);
    --kda-radius:         20px;
    --kda-radius-sm:      12px;
    --kda-radius-xs:      8px;
    --kda-transition:     0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Container ─────────────────────────────────────────────── */
.kda-skin-analyzer {
    max-width: 580px;
    margin: 24px auto;
    padding: 28px 28px 24px;
    background: var(--kda-surface);
    border-radius: var(--kda-radius);
    box-shadow: var(--kda-shadow-lg);
    border: 1px solid var(--kda-border);
    font-family: 'Georgia', 'Times New Roman', serif;
    color: var(--kda-text);
    line-height: 1.5;
}

/* ── Title ─────────────────────────────────────────────────── */
.kda-title {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin: 0 0 6px;
    color: var(--kda-text);
}

.kda-subtitle {
    font-size: 13.5px;
    color: var(--kda-text-3);
    margin: 0 0 20px;
    line-height: 1.5;
}

/* ── Upload Area ───────────────────────────────────────────── */
.kda-upload-area {
    position: relative;
    padding: 22px 18px;
    border: 2px dashed var(--kda-border);
    border-radius: var(--kda-radius-sm);
    background: var(--kda-surface-2);
    cursor: pointer;
    text-align: center;
    transition: border-color var(--kda-transition),
                background var(--kda-transition),
                box-shadow var(--kda-transition);
    margin-bottom: 16px;
    outline: none;
}

.kda-upload-area:hover,
.kda-upload-area:focus-visible {
    border-color: var(--kda-primary);
    background: var(--kda-surface-3);
    box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.18);
}

.kda-upload-area.dragover {
    border-color: var(--kda-accent);
    background: #f5f2ff;
    box-shadow: 0 0 0 4px rgba(124, 92, 191, 0.15);
}

.kda-upload-primary {
    font-size: 14.5px;
    font-weight: 600;
    color: var(--kda-primary);
    margin: 0 0 4px;
    transition: color var(--kda-transition);
}

.kda-upload-area:hover .kda-upload-primary {
    color: #a07840;
}

.kda-upload-hint {
    font-size: 12.5px;
    color: var(--kda-text-3);
    margin: 0;
}

/* Pre-tip (inserted by JS) */
.kda-pretip {
    margin-top: 10px;
    font-size: 12.5px;
    color: var(--kda-text-2);
    opacity: 0.85;
    line-height: 1.4;
}

#kda-file-input {
    display: none;
}

/* ── Preview Image ─────────────────────────────────────────── */
#kda-preview {
    display: block;
    width: 100%;
    max-height: 200px;
    object-fit: cover;
    border-radius: var(--kda-radius-sm);
    margin-bottom: 14px;
    border: 1px solid var(--kda-border);
}

/* ── Buttons ───────────────────────────────────────────────── */
#kda-analyze-btn {
    display: block;
    width: 100%;
    padding: 13px 20px;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    letter-spacing: 0.4px;
    color: #ffffff;
    background: linear-gradient(135deg, #c9a96e 0%, #a07840 100%);
    border: none;
    border-radius: var(--kda-radius-sm);
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(160, 120, 64, 0.32);
    transition: opacity var(--kda-transition),
                transform var(--kda-transition),
                box-shadow var(--kda-transition);
    margin-bottom: 16px;
}

#kda-analyze-btn:hover:not(:disabled) {
    opacity: 0.92;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(160, 120, 64, 0.40);
}

#kda-analyze-btn:active:not(:disabled) {
    transform: translateY(0);
    opacity: 1;
}

#kda-analyze-btn:disabled {
    background: linear-gradient(135deg, #d6c9ad 0%, #bca880 100%);
    cursor: not-allowed;
    box-shadow: none;
    opacity: 0.65;
}

/* Secondary button */
.kda-btn-secondary {
    display: block;
    width: 100%;
    padding: 11px 18px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    color: var(--kda-text-2);
    background: var(--kda-surface-2);
    border: 1px solid var(--kda-border);
    border-radius: var(--kda-radius-sm);
    cursor: pointer;
    margin-top: 12px;
    transition: background var(--kda-transition),
                border-color var(--kda-transition);
}

.kda-btn-secondary:hover {
    background: var(--kda-surface-3);
    border-color: var(--kda-primary-light);
}

/* ── Loading State ─────────────────────────────────────────── */
.kda-loading {
    text-align: center;
    padding: 28px 20px;
    color: var(--kda-text-2);
    font-size: 14px;
}

.kda-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--kda-border);
    border-top-color: var(--kda-primary);
    border-radius: 50%;
    margin: 0 auto 14px;
    animation: kda-spin 0.9s linear infinite;
}

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

/* ── Results Panel ─────────────────────────────────────────── */
#kda-result {
    margin-top: 2px;
    border-radius: var(--kda-radius-sm);
    overflow: hidden;
    text-align: start;
    direction: inherit;
}

/* Success badge */
.kda-badge-complete {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 14px;
    border-radius: 999px;
    background: rgba(45, 140, 94, 0.10);
    color: var(--kda-success);
    font-size: 13.5px;
    font-weight: 700;
    margin-bottom: 12px;
}

/* Report box */
.kda-report {
    padding: 16px;
    border-radius: var(--kda-radius-xs);
    background: var(--kda-surface-2);
    border: 1px solid var(--kda-border);
    font-size: 13.5px;
    font-family: 'Courier New', Courier, monospace;
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--kda-text);
    max-height: 420px;
    overflow-y: auto;
    scroll-behavior: smooth;
    text-align: inherit;
    direction: inherit;
    unicode-bidi: plaintext;
    box-shadow: inset 0 1px 3px rgba(44, 36, 23, 0.06);
}

/* Scrollbar styling (webkit) */
.kda-report::-webkit-scrollbar { width: 6px; }
.kda-report::-webkit-scrollbar-track { background: transparent; }
.kda-report::-webkit-scrollbar-thumb {
    background: var(--kda-border);
    border-radius: 999px;
}

/* Error state */
.kda-error {
    padding: 14px 16px;
    border-radius: var(--kda-radius-xs);
    background: rgba(181, 48, 48, 0.07);
    color: var(--kda-error);
    font-size: 13.5px;
    border: 1px solid rgba(181, 48, 48, 0.20);
}

/* ── History Panel ─────────────────────────────────────────── */
#kda-history {
    margin-top: 10px;
}

.kda-history-wrap {
    padding: 16px;
    background: var(--kda-surface-2);
    border: 1px solid var(--kda-border);
    border-radius: var(--kda-radius-sm);
}

.kda-history-wrap h4 {
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 12px;
    color: var(--kda-text);
}

.kda-history-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--kda-border);
    font-size: 13px;
    color: var(--kda-text-2);
    line-height: 1.5;
}

.kda-history-item:last-child {
    border-bottom: none;
}

.kda-history-item strong {
    color: var(--kda-text);
    display: block;
    margin-bottom: 2px;
}

.kda-empty-history {
    text-align: center;
    color: var(--kda-text-3);
    font-size: 13.5px;
    padding: 20px 0;
}

/* ── RTL / LTR Direction ───────────────────────────────────── */
html[dir="rtl"] #kda-result,
html[dir="rtl"] #kda-result .kda-report {
    direction: rtl;
}

html[dir="ltr"] #kda-result,
html[dir="ltr"] #kda-result .kda-report {
    direction: ltr;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 640px) {
    .kda-skin-analyzer {
        margin: 12px 10px;
        padding: 20px 16px 18px;
        border-radius: 16px;
    }

    .kda-title {
        font-size: 18px;
    }

    .kda-upload-area {
        padding: 18px 14px;
        border-radius: 10px;
    }

    #kda-analyze-btn {
        font-size: 14px;
        padding: 12px 16px;
        border-radius: 10px;
    }

    .kda-report {
        font-size: 12.5px;
        max-height: 52vh;
    }
}