/* base.css - Base styles and components for RAID Calculator */

/* ============= Reset & Base ============= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============= Utility Classes ============= */
.hidden { display: none !important; }
.p-0 { padding: 0 !important; }
.mt-1 { margin-top: var(--spacing-base) !important; }
.mb-1-5 { margin-bottom: var(--spacing-xl) !important; }

/* ============= Layout ============= */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-2xl);
}

header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* Logo styles */
.logo-link {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    text-decoration: none;
}

.logo-link:hover .logo {
    opacity: 0.8;
    transition: opacity 0.2s;
}

.logo {
    height: 80px;
    width: auto;
    max-width: 100%;
}

h1 {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    color: var(--gray-600);
    font-size: clamp(0.875rem, 2vw, 1.125rem);
}

.main-grid {
    display: grid;
    grid-template-columns: minmax(320px, 400px) 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

/* ============= Cards ============= */
.card {
    background: white;
    border-radius: var(--spacing-md);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-base);
}

.card h3 {
    font-size: calc(var(--font-lg) * 1.25);
    font-weight: 600;
    margin-bottom: var(--spacing-base);
    color: var(--gray-800);
}

/* ============= Mode Switcher ============= */
.mode-switcher {
    display: flex;
    gap: 0;
    margin: calc(var(--spacing-xl) * -1) calc(var(--spacing-xl) * -1) var(--spacing-xl);
    background: var(--gray-100);
    border-radius: var(--spacing-md) var(--spacing-md) 0 0;
    padding: var(--spacing-xs);
    border-bottom: 2px solid var(--gray-200);
}

.mode-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    background: transparent;
    color: var(--gray-600);
    font-size: clamp(0.75rem, 2vw, 1rem);
    font-weight: 600;
    border-radius: var(--spacing-sm) var(--spacing-sm) 0 0;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mode-btn:hover:not(.active) {
    color: var(--gray-800);
    background: rgba(255, 255, 255, 0.5);
}

.mode-btn.active {
    background: white;
    color: var(--primary);
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.15);
    border-bottom: 3px solid var(--primary);
    margin-bottom: -2px;
    transition: none;
}

/* ============= Forms ============= */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
    font-size: clamp(0.75rem, 2vw, 1rem);
}

.hint {
    font-size: var(--font-base-sm);
    color: var(--gray-500);
    margin-top: var(--spacing-xs);
}

/* Common form controls */
input[type="number"],
select,
.form-control {
    width: 100%;
    padding: 0.625rem var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--spacing-sm);
    font-size: clamp(0.875rem, 2vw, 1rem);
    transition: all 0.2s;
    background: white;
}

input[type="number"]:focus,
select:focus,
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
}

select {
    cursor: pointer;
}

/* Unit Selector */
.unit-selector {
    display: flex;
    gap: var(--spacing-base);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-200);
}

.radio-group,
.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.radio-group {
    font-weight: 500;
    color: var(--gray-700);
}

/* ============= Buttons ============= */
.calculate-button-wrapper {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--gray-200);
    text-align: center;
}

.calculate-btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--spacing-sm);
    font-size: var(--font-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.calculate-btn:disabled {
    background: var(--gray-300);
    color: var(--gray-500);
    cursor: not-allowed;
    box-shadow: none;
    opacity: 0.6;
}

.calculate-btn:not(:disabled):hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.35);
}

.calculate-btn:not(:disabled):active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
}

.calculate-hint {
    display: block;
    margin-top: var(--spacing-sm);
    font-size: var(--font-sm);
    color: var(--gray-500);
    font-style: italic;
}

.save-btn {
    padding: var(--spacing-sm) var(--spacing-base);
    border-radius: 0.375rem;
    font-size: var(--font-base-sm);
    font-weight: 500;
    cursor: pointer;
    background: linear-gradient(135deg, #4b5563 0%, #6b7280 100%);
    color: white;
    border: none;
    transition: all 0.2s;
}

.save-btn:hover {
    background: linear-gradient(135deg, #374151 0%, #4b5563 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(75, 85, 99, 0.3);
}

/* ============= Advanced Mode ============= */
.disk-groups {
    margin-bottom: var(--spacing-base);
}

.disk-group {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--spacing-sm);
    padding: var(--spacing-base);
    margin-bottom: var(--spacing-md);
    position: relative;
    animation: fadeInUp var(--transition-slow) ease-out;
}

.disk-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.disk-group-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

/* Gradient text for desktop only */
@media (min-width: 481px) {
    .disk-group-title {
        background: linear-gradient(135deg, var(--success) 0%, var(--primary) 100%);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }
}

.remove-group-btn {
    background: var(--danger);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--spacing-xs);
    font-size: var(--font-xs);
    cursor: pointer;
    transition: opacity 0.2s;
}

.remove-group-btn:hover {
    opacity: 0.9;
}

.disk-group-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.disk-group-inputs .form-group {
    margin-bottom: 0;
}

.add-group-btn {
    width: 100%;
    padding: 0.625rem;
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: white;
    border: none;
    border-radius: var(--spacing-sm);
    font-size: clamp(0.8rem, 2vw, 0.9rem);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px dashed #0891b2;
    background: rgba(6, 182, 212, 0.1);
    color: #0891b2;
}

.add-group-btn:hover {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: white;
    border: 2px solid #0891b2;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

/* ============= Guide State ============= */
.guide-state {
    padding: var(--spacing-xl);
}

.guide-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--gray-200);
}

.guide-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-base);
    opacity: 0.6;
    color: var(--gray-500);
}

.guide-header h1 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: #292524;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.guide-header h2 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.guide-header p {
    color: var(--gray-600);
    font-size: var(--font-base);
    margin: 0;
}

.guide-content {
    max-width: 100%;
}

.guide-h3 {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--gray-700);
    margin: 0 0 var(--spacing-md) 0;
    font-weight: 600;
    text-align: center;
}

.guide-intro {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--gray-700);
}

.guide-text {
    margin: 0;
    color: var(--gray-700);
}

/* Recommendations Grid */
.recommendations-grid {
    display: grid;
    gap: var(--spacing-base);
}

.recommendation {
    padding-left: var(--spacing-base);
    padding: var(--spacing-base);
    background: var(--gray-50);
    border-radius: var(--spacing-sm);
}

.rec-title {
    font-size: var(--font-base);
    color: var(--gray-800);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.rec-desc {
    font-size: var(--font-base-sm);
    color: var(--gray-600);
    margin: 0;
}

/* Capacity Grid */
.capacity-grid {
    display: grid;
    gap: var(--spacing-sm);
}

.capacity-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: baseline;
}

.capacity-size {
    font-size: var(--font-base);
    color: var(--gray-600);
    font-weight: 600;
    min-width: 80px;
}

.capacity-desc {
    font-size: var(--font-base-sm);
    color: var(--gray-500);
}

/* ============= Responsive Logo ============= */
@media (max-width: 640px) {
    .logo {
        height: 60px;
    }
}

@media (max-width: 480px) {
    .logo {
        height: 50px;
    }
}