/* CSS Variables for theming */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --accent-color: #ff4757;
    --accent-hover: #f5360d;
    --success-color: #2ed573;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: 0.2s ease;
}

/* Dark mode */
.dark-mode {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #1f2940;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --border-color: #33334d;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition), color var(--transition);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    text-align: center;
    padding: 20px 0 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 8px;
    font-weight: 800;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Page navigation */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}

.page-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 6px;
    transition: all var(--transition);
}

.page-nav a:hover {
    color: var(--accent-color);
    background-color: var(--bg-secondary);
}

.page-nav a.active {
    color: var(--accent-color);
    background-color: rgba(255, 71, 87, 0.1);
}

/* Main Display - THE STAR OF THE SHOW */
.main-display {
    text-align: center;
    padding: 40px 20px;
    position: relative;
}

.time-display {
    font-size: 3rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.cost-display {
    font-size: 14rem;
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    color: var(--accent-color);
    transition: transform 0.1s ease;
    line-height: 1;
    letter-spacing: -4px;
}

.cost-display.pulse {
    transform: scale(1.02);
}

.cost-currency {
    font-size: 6rem;
    vertical-align: super;
    margin-right: 5px;
}

.cost-amount {
    display: inline-block;
    min-width: 350px;
    text-align: right;
}

/* Burning indicator */
.burning-indicator {
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), #ffa502, var(--accent-color));
    background-size: 200% 100%;
    border-radius: 2px;
    margin: 30px auto 0;
    width: 200px;
    opacity: 0;
    transition: opacity var(--transition);
}

.burning-indicator.active {
    opacity: 1;
    animation: burn 1s linear infinite;
}

@keyframes burn {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Warning message */
.warning-message {
    text-align: center;
    padding: 12px 20px;
    margin: 20px auto 0;
    max-width: 500px;
    background-color: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    color: var(--accent-color);
    font-weight: 500;
    display: none;
}

.warning-message.show {
    display: block;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 20px 0;
}

.btn {
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

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

.btn-primary:hover:not(:disabled) {
    background-color: #26af61;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 213, 115, 0.3);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: #e04050;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 71, 87, 0.3);
}

.btn-tertiary {
    background-color: var(--text-secondary);
    color: white;
}

.btn-tertiary:hover:not(:disabled) {
    background-color: #555;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 24px;
    font-size: 0.9rem;
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--bg-secondary);
    border-color: var(--accent-color);
}

/* Share link */
.share-link {
    text-align: center;
    margin: 15px 0;
}

.share-link a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition);
}

.share-link a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* Input section */
.input-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

/* Custom inputs row - display inline on desktop */
.custom-inputs-row {
    display: flex;
    gap: 15px;
    grid-column: 1 / -1;
}

.custom-inputs-row .input-group {
    flex: 1;
    min-width: 0;
}

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

.input-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input,
.input-group select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: var(--bg-card);
    color: var(--text-primary);
    transition: border-color var(--transition);
    width: 100%;
    box-sizing: border-box;
}

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

.input-group input[type="number"] {
    -moz-appearance: textfield;
}

.input-group input[type="number"]::-webkit-inner-spin-button,
.input-group input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Two Column Layout */
.two-column-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

/* Cost Reference */
.cost-reference {
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
}

.cost-reference h3 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cost-reference-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.cost-reference-subtitle span {
    font-weight: 600;
    color: var(--text-primary);
}

.cost-reference-table {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cost-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: var(--bg-card);
    border-radius: 6px;
    transition: var(--transition);
}

.cost-row:hover {
    transform: translateX(4px);
}

.cost-row.highlight {
    background-color: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--accent-color);
}

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

.cost-value {
    font-weight: 600;
    color: var(--accent-color);
    font-variant-numeric: tabular-nums;
    font-size: 0.95rem;
}

/* Quick Declines */
.quick-declines {
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
}

.quick-declines h3 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.declines-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.decline-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.decline-item {
    padding: 12px 14px;
    background-color: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.decline-item:hover {
    border-color: var(--accent-color);
    transform: translateX(4px);
}

.decline-item.copied {
    border-color: var(--success-color);
    background-color: rgba(46, 213, 115, 0.1);
}

.decline-title {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.decline-preview {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.view-all-link {
    display: inline-block;
    margin-top: 15px;
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
}

.view-all-link:hover {
    text-decoration: underline;
}

/* SEO Content */
.seo-content {
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.seo-content h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.seo-content h3 {
    font-size: 1.2rem;
    margin: 30px 0 15px;
    color: var(--text-primary);
}

.seo-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
}

.seo-content ul {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    padding-left: 25px;
}

.seo-content li {
    margin-bottom: 10px;
}

.seo-content strong {
    color: var(--text-primary);
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--success-color);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Dark mode toggle */
.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    width: auto;
    min-width: 50px;
    height: 40px;
    padding: 0 15px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    box-shadow: var(--shadow);
    z-index: 100;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dark-mode-toggle:hover {
    transform: translateY(-2px);
    border-color: var(--accent-color);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 0 20px;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
    color: var(--text-secondary);
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    font-size: 0.85rem;
}

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

/* Responsive */
@media (max-width: 700px) {
    header h1 {
        font-size: 2rem;
    }

    .time-display {
        font-size: 2.2rem;
    }

    .cost-display {
        font-size: 8.5rem;
        letter-spacing: -3px;
    }

    .cost-currency {
        font-size: 3.5rem;
    }

    .cost-amount {
        min-width: 220px;
    }

    .two-column-layout {
        grid-template-columns: 1fr;
    }

    .controls {
        flex-direction: row;
        gap: 8px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
        flex: 1;
    }

}

@media (max-width: 450px) {
    .cost-display {
        font-size: 6.5rem;
    }

    .cost-currency {
        font-size: 2.8rem;
    }

    .cost-amount {
        min-width: 180px;
    }
}