/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

:root {
    /* Color Palette - Light Mode */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-primary: #2563eb;
    --accent-primary-hover: #1d4ed8;
    --accent-secondary: #0d9488;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --card-radius: 12px;
    --button-radius: 8px;
    --transition-speed: 0.3s;
}

@media (prefers-color-scheme: dark) {
    :root:not(.light-theme) {
        /* Color Palette - Dark Mode */
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --text-primary: #f8fafc;
        --text-secondary: #94a3b8;
        --text-muted: #64748b;
        --accent-primary: #3b82f6;
        --accent-primary-hover: #60a5fa;
        --accent-secondary: #14b8a6;
        --border-color: #334155;
        --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
        --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
        --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    }
}

:root.dark-theme {
    /* Manual Dark Mode Override */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #3b82f6;
    --accent-primary-hover: #60a5fa;
    --accent-secondary: #14b8a6;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

:root.light-theme {
    /* Manual Light Mode Override */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent-primary: #2563eb;
    --accent-primary-hover: #1d4ed8;
    --accent-secondary: #0d9488;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Section */
header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 1.75rem;
    color: var(--accent-primary);
}

header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: var(--button-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: border-color var(--transition-speed), background-color var(--transition-speed);
}

.theme-toggle-btn:hover {
    background-color: var(--bg-primary);
    border-color: var(--text-muted);
}

/* Main Layout */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 992px) {
    main {
        grid-template-columns: 450px 1fr;
    }
}

/* Cards & Containers */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: background-color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 650;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 0.25rem;
}

/* Setup Panel styling */
.setup-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.875rem;
    font-weight: 550;
    color: var(--text-secondary);
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon i {
    position: absolute;
    left: 0.75rem;
    color: var(--text-muted);
}

.input-with-icon input {
    width: 100%;
    padding: 0.75rem 0.75rem 0.75rem 2.25rem;
    border: 1px solid var(--border-color);
    border-radius: var(--button-radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.input-with-icon input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

.btn-save-key {
    align-self: flex-end;
    background-color: var(--accent-primary);
    color: #ffffff;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--button-radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background-color var(--transition-speed);
}

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

/* Mode Tabs */
.input-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 0.25rem 0.75rem;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-speed), border-color var(--transition-speed);
}

.tab-btn.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

/* Input Workspace area */
.input-workspace {
    position: relative;
    background-color: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--card-radius);
    aspect-ratio: 4 / 3;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition-speed), background-color var(--transition-speed);
}

.input-workspace.dragover {
    border-color: var(--accent-primary);
    background-color: rgba(37, 99, 235, 0.05);
}

/* Camera components */
#webcam-container {
    width: 100%;
    height: 100%;
    display: none;
    position: relative;
}

#webcam-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.webcam-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    height: 70%;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 8px;
    pointer-events: none;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
}

.webcam-overlay::after {
    content: 'Posisikan Uang di Kotak Ini';
    position: absolute;
    bottom: -2rem;
    left: 50%;
    transform: translateX(-50%);
    color: #ffffff;
    font-size: 0.75rem;
    white-space: nowrap;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Upload Components */
#upload-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1.5rem;
    cursor: pointer;
}

#upload-preview {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: none;
}

.upload-icon {
    font-size: 2.5rem;
    color: var(--text-muted);
}

.upload-text {
    font-size: 0.9rem;
    font-weight: 550;
    color: var(--text-secondary);
    text-align: center;
}

.upload-subtext {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Controls Buttons */
.controls-bar {
    display: flex;
    gap: 0.75rem;
}

.btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: var(--button-radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #ffffff;
    border: none;
}

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

.btn-primary:disabled {
    background-color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

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

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

/* Prediction Display */
.prediction-box {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background-color: var(--bg-primary);
    border-radius: var(--button-radius);
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.prediction-item {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.prediction-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    font-weight: 600;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background-color: var(--accent-secondary);
    border-radius: 4px;
    transition: width 0.2s ease-out;
}

/* Analysis Container (Gemini Content) */
.analysis-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.status-placeholder {
    padding: 3rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    text-align: center;
    gap: 1rem;
}

.status-placeholder i {
    font-size: 3rem;
}

.currency-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.25rem;
}

.currency-identity {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.currency-name-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.currency-code {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent-primary);
}

.currency-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.country-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 550;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.exchange-rate-badge {
    background-color: rgba(13, 148, 136, 0.1);
    border: 1px solid var(--accent-secondary);
    color: var(--accent-secondary);
    padding: 0.5rem 0.85rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 700;
    text-align: right;
    display: flex;
    flex-direction: column;
}

.exchange-rate-badge span {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: normal;
}

/* Gemini Analysis Output */
.gemini-explanation {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.gemini-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gemini-section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.gemini-section-title i {
    color: var(--accent-primary);
}

.gemini-content {
    background-color: var(--bg-primary);
    border-left: 3px solid var(--accent-primary);
    padding: 0.75rem 1rem;
    border-radius: 0 var(--button-radius) var(--button-radius) 0;
}

.gemini-content p {
    margin-bottom: 0.5rem;
}
.gemini-content p:last-child {
    margin-bottom: 0;
}

/* Loading indicators */
.loading-dots {
    display: inline-flex;
    gap: 4px;
}

.loading-dots span {
    width: 6px;
    height: 6px;
    background-color: var(--text-muted);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1.0); }
}

/* Toast Message */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: var(--button-radius);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateY(150%);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast.show {
    transform: translateY(0);
}

.toast-success i { color: var(--accent-secondary); }
.toast-error i { color: #ef4444; }

/* Instructions Helper */
.instruction-list {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding-left: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

/* Footer styling */
footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: auto;
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}