/**
 * 040 GROUP - BRAND IDENTITY CSS
 * Central brand identity system with colors, fonts, and utilities
 * 
 * Version: 1.0.0
 * Date: December 23, 2025
 */

/* ============================================
   BRAND COLOR PALETTE
   ============================================ */

:root {
    /* Primary Brand Colors */
    --brand-black: #151517;
    --brand-white: #FFFFFF;
    --brand-petrolium: #0E4347;
    
    /* Color Aliases for Semantic Use */
    --color-primary: var(--brand-petrolium);
    --color-text: var(--brand-black);
    --color-text-light: #4A5568;
    --color-text-muted: #718096;
    --color-bg: var(--brand-white);
    --color-bg-alt: #F7FAFC;
    --color-border: #E2E8F0;
    --color-border-dark: #CBD5E0;
    
    /* Accent Colors (derived from brand palette) */
    --color-accent: var(--brand-petrolium);
    --color-accent-light: #1A5D63;
    --color-accent-dark: #0A2E31;
    
    /* Status Colors (using brand palette as base) */
    --color-success: #38A169;
    --color-success-light: #C6F6D5;
    --color-warning: #D69E2E;
    --color-warning-light: #FEF3C7;
    --color-error: #E53E3E;
    --color-error-light: #FED7D7;
    --color-error-text: #742A2A;
    --color-info: var(--brand-petrolium);
    --color-info-light: #B2E5EA;
}

/* ============================================
   BRAND FONTS
   ============================================ */

/* Primary Font: Helvetica Neue Condensed (for titles/headlines) */
@font-face {
    font-family: 'Helvetica Neue Condensed';
    src: local('Helvetica Neue Condensed'),
         local('HelveticaNeue-Condensed'),
         local('Helvetica Neue');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Helvetica Neue Condensed';
    src: local('Helvetica Neue Condensed Bold'),
         local('HelveticaNeue-CondensedBold'),
         local('Helvetica Neue');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* Secondary Font: DIN 2014 Narrow (for subtitles/body text) */
@font-face {
    font-family: 'DIN 2014 Narrow';
    src: local('DIN 2014 Narrow'),
         local('DIN2014-Narrow'),
         local('DIN Condensed');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'DIN 2014 Narrow';
    src: local('DIN 2014 Narrow Bold'),
         local('DIN2014-NarrowBold'),
         local('DIN Condensed');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

/* Font Family Variables */
:root {
    --font-primary: 'Helvetica Neue Condensed', 'Helvetica Neue', 'Helvetica', 'Arial Narrow', 'Arial', sans-serif;
    --font-secondary: 'DIN 2014 Narrow', 'DIN Condensed', 'Arial Narrow', 'Arial', sans-serif;
    --font-body: var(--font-primary); /* Use primary font as default body font */
    --font-heading: var(--font-primary);
    
    /* Letter Spacing - DIN 2014 needs 15% more spacing (only when DIN is used) */
    --letter-spacing-din: 0.15em; /* 15% more spacing for DIN 2014 Narrow */
    --letter-spacing-primary: 0; /* No extra spacing for primary font */
}

/* ============================================
   TYPOGRAPHY SCALE
   ============================================ */

:root {
    /* Font Sizes */
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-lg: 1.125rem;     /* 18px */
    --font-size-xl: 1.25rem;      /* 20px */
    --font-size-2xl: 1.5rem;      /* 24px */
    --font-size-3xl: 1.875rem;    /* 30px */
    --font-size-4xl: 2.25rem;     /* 36px */
    --font-size-5xl: 3rem;        /* 48px */
    
    /* Line Heights */
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
}

/* Typography Base Styles */
body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    letter-spacing: var(--letter-spacing-primary); /* Primary font uses normal spacing */
}

/* Heading Styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text);
    margin: 0;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

/* Subtitle Styles */
.subtitle,
.text-subtitle {
    font-family: var(--font-secondary);
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    line-height: var(--line-height-normal);
    letter-spacing: var(--letter-spacing-din); /* Apply DIN 2014 letter spacing */
}

/* Body Text Variants */
.text-small {
    font-size: var(--font-size-sm);
}

.text-large {
    font-size: var(--font-size-lg);
}

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

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

/* ============================================
   LOGO STYLING UTILITIES
   ============================================ */

.logo-link {
    display: inline-block;
    line-height: 0;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.logo-link:hover {
    opacity: 0.8;
}

.logo-link img {
    display: block;
    height: auto;
    width: auto;
    max-width: 100%;
}

/* Logo Size Variants */
.logo-small img {
    height: 40px;
    max-height: 40px;
}

.logo-medium img {
    height: 80px;
    max-height: 80px;
}

.logo-large img {
    height: 120px;
    max-height: 120px;
}

.logo-xlarge img {
    height: 150px;
    max-height: 150px;
}

/* Header Logo - Predominant, larger than H1, occupies header space */
.logo-header img {
    height: clamp(100px, 15vw, 180px); /* Larger than H1, responsive */
    width: auto; /* Maintain aspect ratio */
    max-width: 100%;
    display: block;
}

/* Logo in Header (for public pages) */
.header-logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-logo img {
    height: clamp(100px, 15vw, 180px); /* Predominant size, larger than text */
    width: auto; /* Maintain aspect ratio */
    max-width: 100%;
}

/* ============================================
   BRAND COLOR UTILITIES
   ============================================ */

/* Background Colors */
.bg-brand-black { background-color: var(--brand-black); }
.bg-brand-white { background-color: var(--brand-white); }
.bg-brand-petrolium { background-color: var(--brand-petrolium); }
.bg-primary { background-color: var(--color-primary); }

/* Text Colors */
.text-brand-black { color: var(--brand-black); }
.text-brand-white { color: var(--brand-white); }
.text-brand-petrolium { color: var(--brand-petrolium); }
.text-primary { color: var(--color-primary); }

/* Border Colors */
.border-brand-black { border-color: var(--brand-black); }
.border-brand-petrolium { border-color: var(--brand-petrolium); }
.border-primary { border-color: var(--color-primary); }

/* ============================================
   BRAND GRADIENT UTILITIES
   ============================================ */

.gradient-petrolium {
    background: linear-gradient(135deg, var(--brand-petrolium) 0%, var(--color-accent-light) 100%);
}

:root {
    --gradient-dark: linear-gradient(180deg, var(--brand-black) 0%, #2D3748 100%);
    --gradient-petrolium: linear-gradient(135deg, var(--brand-petrolium) 0%, var(--color-accent-light) 100%);
}

.gradient-dark {
    background: var(--gradient-dark);
}

.gradient-petrolium-dark {
    background: linear-gradient(180deg, var(--brand-petrolium) 0%, var(--color-accent-dark) 100%);
}

/* ============================================
   BUTTON STYLES (Brand Colors)
   ============================================ */

.btn-brand-primary {
    background-color: var(--brand-petrolium);
    color: var(--brand-white);
    border: 2px solid var(--brand-petrolium);
}

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

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

.btn-brand-outline:hover {
    background-color: var(--brand-petrolium);
    color: var(--brand-white);
}

.btn-brand-dark {
    background-color: var(--brand-black);
    color: var(--brand-white);
    border: 2px solid var(--brand-black);
}

.btn-brand-dark:hover {
    background-color: #2D3748;
    border-color: #2D3748;
}

/* ============================================
   CARD STYLES (Brand Colors)
   ============================================ */

.card-brand {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(21, 21, 23, 0.08);
}

.card-brand-petrolium {
    background: linear-gradient(135deg, var(--brand-petrolium) 0%, var(--color-accent-light) 100%);
    color: var(--brand-white);
    border: none;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(14, 67, 71, 0.3);
}

/* ============================================
   RESPONSIVE TYPOGRAPHY
   ============================================ */

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 1.875rem;  /* 30px */
        --font-size-3xl: 1.5rem;     /* 24px */
        --font-size-2xl: 1.25rem;    /* 20px */
    }
    
    .header-logo img {
        height: clamp(50px, 10vw, 80px);
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    :root {
        --color-bg: var(--brand-white);
        --color-text: var(--brand-black);
    }
    
    .logo-link img {
        max-height: 60px;
    }
}