/* ============================================================================
   UnitDocs Brand System
   ============================================================================
   SHARED FILE: This file is identical in both Website and WebApp projects.

   When you modify this file, you MUST copy it to the other project:
   - src/UnitDocs.Website/wwwroot/css/brand.css
   - src/UnitDocs.WebApp/wwwroot/css/brand.css

   Theme selector: Uses Bootstrap 5 native [data-bs-theme="dark|light"]
   ============================================================================ */

/* ============================================================================
   Brand Tokens - Light Theme (Default)
   ============================================================================ */
:root {
    /* Primary Palette - Deep Navy (Trust & Stability) */
    --color-primary: #1a2744;
    --color-primary-light: #2d3f5e;
    --color-primary-dark: #0f1829;

    /* Accent - Warm Amber (Premium & Action) */
    --color-accent: #c4841d;
    --color-accent-light: #e09b2e;
    --color-accent-dark: #9a6816;

    /* Neutrals */
    --color-bg: #faf9f7;
    --color-bg-alt: #f3f1ed;
    --color-surface: #ffffff;
    --color-border: #e5e2dc;
    --color-text: #2c2c2c;
    --color-text-muted: #6b6b6b;
    --color-text-light: #8a8a8a;

    /* Semantic States */
    --color-error: #dc3545;
    --color-error-bg: #f8d7da;
    --color-error-border: #f5c2c7;
    --color-success: #198754;
    --color-success-bg: #d1e7dd;
    --color-success-border: #badbcc;
    --color-warning: #ffc107;
    --color-required: var(--color-accent);

    /* RGB Values (for rgba usage) */
    --color-primary-rgb: 26, 39, 68;
    --color-accent-rgb: 196, 132, 29;
    --color-success-rgb: 25, 135, 84;
    --color-error-rgb: 220, 53, 69;
    --color-warning-rgb: 255, 193, 7;

    /* Typography */
    --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Icon Sizing */
    --icon-size-lg: 48px;
    --icon-size-md: 40px;
    --icon-size-nav: 26px;
    --icon-font-lg: 1.5rem;
    --icon-font-md: 1.25rem;
    --icon-font-sm: 1.125rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(26, 39, 68, 0.05);
    --shadow-md: 0 4px 12px rgba(26, 39, 68, 0.08);
    --shadow-lg: 0 12px 32px rgba(26, 39, 68, 0.12);

    /* Bootstrap Overrides */
    --bs-primary: var(--color-primary);
    --bs-primary-rgb: 26, 39, 68;
    --bs-link-color: var(--color-primary);
    --bs-link-hover-color: var(--color-accent);
    --bs-body-font-family: var(--font-body);
    --bs-body-color: var(--color-text);
    --bs-body-bg: var(--color-bg);
    --bs-border-color: var(--color-border);
}

/* ============================================================================
   Dark Theme
   ============================================================================ */
[data-bs-theme="dark"] {
    /* Primary flips for dark backgrounds */
    --color-primary: #e8eaf0;
    --color-primary-light: #f5f6f8;
    --color-primary-dark: #c5c9d4;

    /* Accent stays warm but brighter */
    --color-accent: #e09b2e;
    --color-accent-light: #f0b04a;
    --color-accent-dark: #c4841d;

    /* Neutrals */
    --color-bg: #0f1219;
    --color-bg-alt: #161b24;
    --color-surface: #1c222d;
    --color-border: #2d3544;
    --color-text: #e8eaf0;
    --color-text-muted: #9ca3b4;
    --color-text-light: #6b7280;

    /* Semantic States */
    --color-error: #ea868f;
    --color-error-bg: #2c0b0e;
    --color-error-border: #58151c;
    --color-success: #75b798;
    --color-success-bg: #051b11;
    --color-success-border: #0a3622;
    --color-warning: #ffda6a;
    --color-required: var(--color-accent);

    /* RGB Values (for rgba usage) - updated for dark theme */
    --color-primary-rgb: 232, 234, 240;
    --color-accent-rgb: 224, 155, 46;
    --color-success-rgb: 117, 183, 152;
    --color-error-rgb: 234, 134, 143;
    --color-warning-rgb: 255, 218, 106;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);

    /* Bootstrap dark overrides */
    --bs-body-color: var(--color-text);
    --bs-body-bg: var(--color-bg);
    --bs-border-color: var(--color-border);
}

/* ============================================================================
   Typography
   ============================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--color-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

.text-muted {
    color: var(--color-text-muted) !important;
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

/* ============================================================================
   Buttons - Bootstrap Component Overrides
   ============================================================================ */
.btn {
    font-family: var(--font-body);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    border: none;
    transition: var(--transition-base);
}

.btn-primary {
    --bs-btn-bg: var(--color-primary);
    --bs-btn-border-color: var(--color-primary);
    --bs-btn-color: var(--color-surface);
    --bs-btn-hover-bg: var(--color-primary-light);
    --bs-btn-hover-border-color: var(--color-primary-light);
    --bs-btn-hover-color: var(--color-surface);
    --bs-btn-active-bg: var(--color-primary-dark);
    --bs-btn-active-border-color: var(--color-primary-dark);
    --bs-btn-active-color: var(--color-surface);
    --bs-btn-disabled-bg: var(--color-primary);
    --bs-btn-disabled-border-color: var(--color-primary);
    --bs-btn-disabled-color: var(--color-surface);
}

[data-bs-theme="dark"] .btn-primary {
    --bs-btn-color: var(--color-bg);
    --bs-btn-hover-color: var(--color-bg);
    --bs-btn-active-color: var(--color-bg);
    --bs-btn-disabled-color: var(--color-bg);
}

.btn-accent {
    --bs-btn-bg: var(--color-accent);
    --bs-btn-border-color: var(--color-accent);
    --bs-btn-color: #ffffff;
    --bs-btn-hover-bg: var(--color-accent-light);
    --bs-btn-hover-border-color: var(--color-accent-light);
    --bs-btn-hover-color: #ffffff;
    --bs-btn-active-bg: var(--color-accent-dark);
    --bs-btn-active-border-color: var(--color-accent-dark);
    --bs-btn-active-color: #ffffff;
    --bs-btn-disabled-bg: var(--color-accent);
    --bs-btn-disabled-border-color: var(--color-accent);
    --bs-btn-disabled-color: #ffffff;
    color: #ffffff;
}

[data-bs-theme="dark"] .btn-accent {
    --bs-btn-color: #ffffff;
    --bs-btn-hover-color: #ffffff;
    --bs-btn-active-color: #ffffff;
    --bs-btn-disabled-color: #ffffff;
    color: #ffffff;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline-primary {
    --bs-btn-color: var(--color-primary);
    --bs-btn-border-color: var(--color-primary);
    --bs-btn-hover-bg: var(--color-primary);
    --bs-btn-hover-border-color: var(--color-primary);
    --bs-btn-hover-color: var(--color-surface);
    --bs-btn-active-bg: var(--color-primary-dark);
    --bs-btn-active-border-color: var(--color-primary-dark);
    --bs-btn-active-color: var(--color-surface);
}

[data-bs-theme="dark"] .btn-outline-primary {
    --bs-btn-hover-color: var(--color-bg);
    --bs-btn-active-color: var(--color-bg);
}

@media (hover: hover) and (pointer: fine) {
    .btn:hover {
        transform: translateY(-1px);
        filter: drop-shadow(0 4px 12px rgba(var(--color-primary-rgb), 0.1));
    }
}

/* ============================================================================
   Cards
   ============================================================================ */
.card {
    --bs-card-bg: var(--color-surface);
    --bs-card-border-color: var(--color-border);
    --bs-card-border-radius: 12px;
    --bs-card-cap-bg: var(--color-bg-alt);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

@media (hover: hover) and (pointer: fine) {
    .card:hover {
        filter: drop-shadow(0 4px 12px rgba(var(--color-primary-rgb), 0.1));
    }
}

/* ============================================================================
   Forms
   ============================================================================ */
.form-control, .form-select {
    background-color: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text);
    border-radius: 6px;
    font-size: 16px; /* Prevents iOS zoom */
}

.form-control:focus, .form-select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 0.2rem rgba(var(--color-accent-rgb), 0.15);
}

.form-control::placeholder {
    color: var(--color-text-light);
}

/* Required Fields - Use .required-field class on container div */
.required-field > .form-label::after,
.required-field > label::after {
    content: " *";
    color: var(--color-required);
    font-weight: 700;
}

/* Invalid State */
.form-control.is-invalid,
.form-select.is-invalid,
.form-control:invalid:not(:placeholder-shown),
.form-select:invalid:not(:placeholder-shown) {
    border-color: var(--color-error);
    border-width: 2px;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

[data-bs-theme="dark"] .form-control.is-invalid,
[data-bs-theme="dark"] .form-select.is-invalid,
[data-bs-theme="dark"] .form-control:invalid:not(:placeholder-shown),
[data-bs-theme="dark"] .form-select:invalid:not(:placeholder-shown) {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23ea868f'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23ea868f' stroke='none'/%3e%3c/svg%3e");
}

.form-control.is-invalid:focus,
.form-select.is-invalid:focus,
.form-control:invalid:not(:placeholder-shown):focus,
.form-select:invalid:not(:placeholder-shown):focus {
    border-color: var(--color-error);
    box-shadow: 0 0 0 0.2rem rgba(var(--color-error-rgb), 0.15);
}

.invalid-feedback,
.validation-message {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--color-error);
}

/* Valid State (optional - use when you want to show success) */
.form-control.is-valid,
.form-select.is-valid {
    border-color: var(--color-success);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%23198754' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

[data-bs-theme="dark"] .form-control.is-valid,
[data-bs-theme="dark"] .form-select.is-valid {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2375b798' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
}

.form-control.is-valid:focus,
.form-select.is-valid:focus {
    border-color: var(--color-success);
    box-shadow: 0 0 0 0.2rem rgba(var(--color-success-rgb), 0.15);
}

.valid-feedback {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: var(--color-success);
}

/* ============================================================================
   Alerts
   ============================================================================ */
.alert-primary {
    --bs-alert-bg: rgba(26, 39, 68, 0.1);
    --bs-alert-border-color: rgba(26, 39, 68, 0.2);
    --bs-alert-color: #1a2744;
}

/* ============================================================================
   Utility Classes
   ============================================================================ */
.bg-surface {
    background-color: var(--color-surface) !important;
}

.bg-alt {
    background-color: var(--color-bg-alt) !important;
}