/* ===============================================================================
   BSL PRO UNIFIED DESIGN SYSTEM
   Created by Claude Code - Comprehensive redesign for consistency
   =============================================================================== */

/* =============================================================================
   DESIGN TOKENS - GLOBAL CSS VARIABLES
   These variables ensure 100% consistency across all pages
   ============================================================================= */

:root {
    /* =============================================================================
       COLOR PALETTE - Primary Brand Colors
       ============================================================================= */
    --primary-color: #304658;           /* BSL PRO Dark Blue - Main brand color */
    --secondary-color: #34465a;         /* BSL PRO Dark Blue - Accent/CTA color */
    --accent-color: #27ae60;            /* BSL PRO Green - Success/highlight */

    /* =============================================================================
       TEXT COLORS - Semantic color usage
       ============================================================================= */
    --text-color: #333333;              /* Primary text color */
    --text-light: #666666;              /* Secondary text color */
    --text-lighter: #999999;            /* Tertiary text color */
    --text-white: #ffffff;              /* White text for dark backgrounds */
    --text-inverse: var(--text-white);   /* Inverse text alias */

    /* =============================================================================
       BACKGROUND COLORS - Consistent surface colors
       ============================================================================= */
    --bg-white: #ffffff;                 /* Pure white background */
    --bg-light: #f8f9fa;                /* Light gray background */
    --bg-lighter: #f3f6f8;              /* Even lighter background */
    --bg-dark: var(--primary-color);    /* Dark background using brand color */
    --bg-section-alt: #fafbfc;          /* Alternate section background */

    /* =============================================================================
       GRADIENTS - Brand gradients for visual impact
       ============================================================================= */
    --gradient-primary: linear-gradient(135deg, #304658 0%, #1e3a4d 100%);
    --gradient-secondary: linear-gradient(135deg, #34465a 0%, #34465aba 100%);
    --gradient-hero: linear-gradient(135deg, #304658 0%, #2c5f2d 25%, #1e3a4d 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(48, 70, 88, 0.8), rgba(64, 64, 65, 0.9));
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);

    /* =============================================================================
       SHADOWS - Elevation system for depth
       ============================================================================= */
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.2);
    --shadow-2xl: 0 20px 60px rgba(0, 0, 0, 0.25);

    /* Button shadows */
    --shadow-btn: var(--shadow-md);
    --shadow-btn-hover: var(--shadow-lg);
    --shadow-btn-active: var(--shadow-sm);

    /* =============================================================================
       TYPOGRAPHY - Consistent font system
       ============================================================================= */
    --font-family-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-heading: var(--font-family-primary);
    --font-family-body: var(--font-family-primary);

    /* ========== ЕДИНЫЕ РАЗМЕРЫ ШРИФТОВ ДЛЯ ВСЕГО САЙТА ========== */
    /* Hero заголовки (главные баннеры) */
    --font-size-hero: 3.5rem;           /* 56px - для главных экранов */

    /* Заголовки */
    --font-size-h1: 2.5rem;             /* 40px - H1 заголовки страниц */
    --font-size-h2: 2rem;               /* 32px - H2 заголовки секций */
    --font-size-h3: 1.5rem;             /* 24px - H3 подзаголовки */
    --font-size-h4: 1.125rem;           /* 18px - H4 заголовки карточек */

    /* Текст */
    --font-size-lg: 1.125rem;           /* 18px - большой текст */
    --font-size-base: 1rem;             /* 16px - основной текст */
    --font-size-sm: 0.875rem;           /* 14px - маленький текст */
    --font-size-xs: 0.75rem;            /* 12px - очень маленький текст */

    /* Старые переменные для совместимости */
    --font-size-xl: 1.25rem;            /* 20px */
    --font-size-2xl: 1.5rem;            /* 24px */
    --font-size-3xl: 2rem;              /* 32px */
    --font-size-4xl: 2.5rem;            /* 40px */
    --font-size-5xl: 3.5rem;            /* 56px */
    --font-size-6xl: 4.5rem;            /* 72px */

    /* Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Line Heights - Межстрочные интервалы */
    --line-height-tight: 1.2;       /* Для заголовков */
    --line-height-normal: 1.5;      /* Стандартный */
    --line-height-relaxed: 1.6;     /* Для основного текста */
    --line-height-loose: 1.8;       /* Для длинных текстов */

    /* =============================================================================
       SPACING - Consistent spacing system
       ============================================================================= */
    --spacing-xs: 0.25rem;       /* 4px */
    --spacing-sm: 0.5rem;        /* 8px */
    --spacing-md: 1rem;          /* 16px */
    --spacing-lg: 1.5rem;        /* 24px */
    --spacing-xl: 2rem;          /* 32px */
    --spacing-2xl: 3rem;         /* 48px */
    --spacing-3xl: 4rem;         /* 64px */
    --spacing-4xl: 6rem;         /* 96px */
    --spacing-5xl: 8rem;         /* 128px */

    /* Component specific spacing */
    --section-padding: var(--spacing-4xl) 0;
    --container-padding: 0 var(--spacing-md);
    --card-padding: var(--spacing-xl);
    --button-padding: var(--spacing-md) var(--spacing-xl);

    /* =============================================================================
       BORDERS & RADIUS - Consistent border treatment
       ============================================================================= */
    --border-width: 1px;
    --border-width-thick: 2px;
    --border-color: #e9ecef;
    --border-color-light: #f1f3f4;
    --border-color-dark: #dee2e6;

    /* Border Radius */
    --border-radius-sm: 0.375rem;   /* 6px */
    --border-radius-md: 0.5rem;     /* 8px */
    --border-radius-lg: 0.75rem;    /* 12px */
    --border-radius-xl: 1rem;       /* 16px */
    --border-radius-2xl: 1.5rem;    /* 24px */
    --border-radius-full: 9999px;   /* Full circle */

    /* =============================================================================
       TRANSITIONS & ANIMATIONS - Smooth interactions
       ============================================================================= */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-slower: 0.75s ease;

    /* Specific transitions */
    --transition-colors: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease;
    --transition-transform: transform 0.3s ease;
    --transition-opacity: opacity 0.3s ease;
    --transition-all: all 0.3s ease;

    /* =============================================================================
       Z-INDEX LAYERS - Consistent layering
       ============================================================================= */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;

    /* =============================================================================
       BREAKPOINTS - Responsive design system
       ============================================================================= */
    --breakpoint-sm: 576px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 992px;
    --breakpoint-xl: 1200px;
    --breakpoint-2xl: 1400px;

    /* Container max widths */
    --container-sm: 540px;
    --container-md: 720px;
    --container-lg: 960px;
    --container-xl: 1140px;
    --container-2xl: 1320px;

    /* =============================================================================
       COMPONENT TOKENS - Specific component styling
       ============================================================================= */

    /* Buttons */
    --btn-font-size: var(--font-size-base);
    --btn-font-weight: var(--font-weight-semibold);
    --btn-line-height: var(--line-height-tight);
    --btn-border-radius: var(--border-radius-lg);
    --btn-padding: var(--spacing-md) var(--spacing-xl);
    --btn-padding-sm: var(--spacing-sm) var(--spacing-lg);
    --btn-padding-lg: var(--spacing-lg) var(--spacing-2xl);

    /* Cards */
    --card-bg: var(--bg-white);
    --card-border: var(--border-width) solid var(--border-color);
    --card-border-radius: var(--border-radius-xl);
    --card-shadow: var(--shadow-md);
    --card-shadow-hover: var(--shadow-lg);

    /* Forms */
    --form-input-bg: var(--bg-white);
    --form-input-border: var(--border-width) solid var(--border-color);
    --form-input-border-radius: var(--border-radius-lg);
    --form-input-padding: var(--spacing-md) var(--spacing-lg);
    --form-input-focus-border: var(--secondary-color);

    /* Navigation */
    --nav-height: 70px;
    --nav-bg: rgba(48, 70, 88, 0.95);
    --nav-link-color: var(--text-white);
    --nav-link-hover: var(--secondary-color);
}

/* =============================================================================
   UTILITY CLASSES - Common patterns for rapid development
   ============================================================================= */

/* Text Colors */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-accent { color: var(--accent-color) !important; }
.text-light { color: var(--text-light) !important; }
.text-lighter { color: var(--text-lighter) !important; }
.text-white { color: var(--text-white) !important; }

/* Background Colors */
.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--secondary-color) !important; }
.bg-accent { background-color: var(--accent-color) !important; }
.bg-light { background-color: var(--bg-light) !important; }
.bg-white { background-color: var(--bg-white) !important; }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }

/* Border Radius */
.rounded-sm { border-radius: var(--border-radius-sm) !important; }
.rounded-md { border-radius: var(--border-radius-md) !important; }
.rounded-lg { border-radius: var(--border-radius-lg) !important; }
.rounded-xl { border-radius: var(--border-radius-xl) !important; }
.rounded-full { border-radius: var(--border-radius-full) !important; }

/* Spacing */
.p-sm { padding: var(--spacing-sm) !important; }
.p-md { padding: var(--spacing-md) !important; }
.p-lg { padding: var(--spacing-lg) !important; }
.p-xl { padding: var(--spacing-xl) !important; }

.m-sm { margin: var(--spacing-sm) !important; }
.m-md { margin: var(--spacing-md) !important; }
.m-lg { margin: var(--spacing-lg) !important; }
.m-xl { margin: var(--spacing-xl) !important; }

/* Typography */
.font-light { font-weight: var(--font-weight-light) !important; }
.font-normal { font-weight: var(--font-weight-normal) !important; }
.font-medium { font-weight: var(--font-weight-medium) !important; }
.font-semibold { font-weight: var(--font-weight-semibold) !important; }
.font-bold { font-weight: var(--font-weight-bold) !important; }

.text-xs { font-size: var(--font-size-xs) !important; }
.text-sm { font-size: var(--font-size-sm) !important; }
.text-base { font-size: var(--font-size-base) !important; }
.text-lg { font-size: var(--font-size-lg) !important; }
.text-xl { font-size: var(--font-size-xl) !important; }
.text-2xl { font-size: var(--font-size-2xl) !important; }
.text-3xl { font-size: var(--font-size-3xl) !important; }
.text-4xl { font-size: var(--font-size-4xl) !important; }

/* Text Alignment */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }

/* Display */
.block { display: block !important; }
.inline-block { display: inline-block !important; }
.flex { display: flex !important; }
.inline-flex { display: inline-flex !important; }
.grid { display: grid !important; }
.hidden { display: none !important; }

/* Flexbox */
.items-center { align-items: center !important; }
.items-start { align-items: flex-start !important; }
.items-end { align-items: flex-end !important; }
.justify-center { justify-content: center !important; }
.justify-between { justify-content: space-between !important; }
.justify-start { justify-content: flex-start !important; }
.justify-end { justify-content: flex-end !important; }

/* Positioning */
.relative { position: relative !important; }
.absolute { position: absolute !important; }
.fixed { position: fixed !important; }
.sticky { position: sticky !important; }

/* Transitions */
.transition-all { transition: var(--transition-all) !important; }
.transition-colors { transition: var(--transition-colors) !important; }
.transition-transform { transition: var(--transition-transform) !important; }

/* =============================================================================
   COMPONENT BASE STYLES - Consistent components
   ============================================================================= */

/* Universal Container */
.bsl-container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: var(--container-padding);
}

@media (min-width: 1400px) {
    .bsl-container {
        max-width: var(--container-2xl);
    }
}

/* Section Wrapper */
.bsl-section {
    padding: var(--section-padding);
}

.bsl-section--dark {
    background: var(--bg-dark);
    color: var(--text-white);
}

.bsl-section--light {
    background: var(--bg-light);
}

/* Card Component */
.bsl-card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: var(--card-border-radius);
    box-shadow: var(--card-shadow);
    padding: var(--card-padding);
    transition: var(--transition-all);
}

.bsl-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}

/* Button System */
.bsl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--btn-padding);
    font-family: var(--font-family-primary);
    font-size: var(--btn-font-size);
    font-weight: var(--btn-font-weight);
    line-height: var(--btn-line-height);
    text-decoration: none;
    border: none;
    border-radius: var(--btn-border-radius);
    cursor: pointer;
    transition: var(--transition-all);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-btn);
    position: relative;
    overflow: hidden;
}

.bsl-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-btn-hover);
}

.bsl-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-btn-active);
}

.bsl-btn--primary {
    background: var(--gradient-secondary);
    color: white;
}

.bsl-btn--primary:hover {
    background: linear-gradient(135deg, #3d5268 0%, #3d5268ba 100%);
}

.bsl-btn--secondary {
    background: transparent;
    color: var(--primary-color);
    border: var(--border-width-thick) solid var(--primary-color);
    box-shadow: none;
}

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

.bsl-btn--accent {
    background: var(--gradient-primary);
    color: var(--text-white);
}

.bsl-btn--small {
    padding: var(--btn-padding-sm);
    font-size: var(--font-size-sm);
}

.bsl-btn--large {
    padding: var(--btn-padding-lg);
    font-size: var(--font-size-lg);
}

/* Typography Components - Единая типографика */
/* Hero заголовки */
.bsl-heading-hero,
.hero-title {
    font-size: var(--font-size-hero);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-white);
    margin-bottom: var(--spacing-lg);
}

/* H1 заголовки */
.bsl-heading-1,
h1 {
    font-size: var(--font-size-h1);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
}

/* H2 заголовки секций */
.bsl-heading-2,
h2,
.section-title {
    font-size: 42px !important;
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: #1a4870;
    margin-bottom: var(--spacing-md);
}

/* H3 подзаголовки */
.bsl-heading-3,
h3 {
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    color:  #304658;
    margin-bottom: var(--spacing-md);
}

/* H4 заголовки карточек */
.bsl-heading-4,
h4 {
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

/* Текст */
.bsl-text-lead {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-lg);
}

p,
.bsl-text-base {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-md);
}

/* Form Components */
.bsl-form-group {
    margin-bottom: var(--spacing-lg);
}

.bsl-form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-color);
}

.bsl-form-input {
    width: 100%;
    padding: var(--form-input-padding);
    border: var(--form-input-border);
    border-radius: var(--form-input-border-radius);
    background: var(--form-input-bg);
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    transition: var(--transition-all);
}

.bsl-form-input:focus {
    outline: none;
    border-color: var(--form-input-focus-border);
    box-shadow: 0 0 0 3px rgba(241, 196, 15, 0.1);
}

/* =============================================================================
   RESPONSIVE DESIGN UTILITIES
   ============================================================================= */

/* Адаптивные размеры шрифтов */
@media (max-width: 768px) {
    :root {
        --font-size-hero: 2.5rem;      /* 40px */
        --font-size-h1: 2rem;          /* 32px */
        --font-size-h2: 1.75rem;       /* 28px */
        --font-size-h3: 1.25rem;       /* 20px */
        --font-size-h4: 1rem;          /* 16px */
    }

    .bsl-section { padding: var(--spacing-3xl) 0; }
    .bsl-container { padding: 0 var(--spacing-lg); }

    .bsl-btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-hero: 2rem;        /* 32px */
        --font-size-h1: 1.75rem;       /* 28px */
        --font-size-h2: 1.5rem;        /* 24px */
        --font-size-h3: 1.125rem;      /* 18px */
        --font-size-h4: 1rem;          /* 16px */
        --font-size-base: 0.9375rem;   /* 15px */
    }

    .bsl-section { padding: var(--spacing-2xl) 0; }
    .bsl-card { padding: var(--spacing-lg); }

    .bsl-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}