/* Framework CSS - Base styles, utilities, and responsive grid system */

/* CSS Custom Properties (Variables) */
:root {
    /* Colors - Deep Midnight Blue & Soft Lavender Purple Theme */
    --color-primary: #22C55E; /* Eco Green */
    --color-primary-light: #064E3B;
    --color-primary-dark: #16A34A;
    --color-secondary: #166534; /* Dark Green */
    --color-secondary-light: #22C55E;
    --color-secondary-dark: #064E3B;
    --color-accent: #86EFAC; /* Light Green Accent */
    --color-accent-light: #BBF7D0;
    --color-success: #22C55E;
    --color-light: #F0FDF4; /* Light Green Background */
    --color-white: #FFFFFF;
    
    /* Grays */
    --color-gray-50: #F8FAF9;
    --color-gray-100: #F1F5F2;
    --color-gray-200: #E2E8E3;
    --color-gray-300: #CBD5CD;
    --color-gray-400: #9CA59E;
    --color-gray-500: #6C766F;
    --color-gray-600: #545D56;
    --color-gray-700: #404A42;
    --color-gray-800: #2A312B;
    --color-gray-900: #1A201B;
    
    /* Status Colors */
    --color-error: #DC2626;
    --color-warning: #D97706;
    --color-info: #2563EB;
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'Monaco', 'Consolas', 'Liberation Mono', 'Courier New', monospace;
    
    --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 */
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    
    /* Border Radius - Standardized to 4px */
    --radius-sm: 4px;
    --radius-base: 4px;
    --radius-md: 4px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(27, 67, 50, 0.05);
    --shadow-base: 0 1px 3px 0 rgba(27, 67, 50, 0.1), 0 1px 2px 0 rgba(27, 67, 50, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(27, 67, 50, 0.1), 0 2px 4px -1px rgba(27, 67, 50, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(27, 67, 50, 0.1), 0 4px 6px -2px rgba(27, 67, 50, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(27, 67, 50, 0.1), 0 10px 10px -5px rgba(27, 67, 50, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* Breakpoints (for reference) */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}

/* Reset and Base Styles */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    line-height: var(--line-height-normal);
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: #064E3B;
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
.h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin: 0 0 var(--space-6);
    color: var(--color-primary);
}

h2,
.h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin: 0 0 var(--space-5);
    color: var(--color-primary);
}

h3,
.h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    margin: 0 0 var(--space-4);
    color: var(--color-primary-light);
}

h4,
.h4 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
    margin: 0 0 var(--space-3);
    color: var(--color-primary-light);
}

h5,
.h5 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    margin: 0 0 var(--space-3);
    color: var(--color-gray-700);
}

h6,
.h6 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-normal);
    margin: 0 0 var(--space-2);
    color: var(--color-gray-700);
}

p {
    margin: 0 0 var(--space-4);
    line-height: var(--line-height-relaxed);
}

a {
    color: #1f2022;
    transition: color var(--transition-fast)
150ms ease-in-out
;
    font-weight: bold;
    text-decoration: underline;
}

a:hover,
a:focus {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Lists */
ul,
ol {
    margin: 0 0 var(--space-4);
    padding-left: var(--space-6);
}

li {
    margin-bottom: var(--space-1);
}

/* Container and Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 640px) {
    .container {
        padding: 0 var(--space-6);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid--cols-1 { grid-template-columns: 1fr; }
.grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid--cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 767px) {
    .grid--cols-2,
    .grid--cols-3,
    .grid--cols-4 {
        grid-template-columns: 1fr;
    }
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex--column { flex-direction: column; }
.flex--wrap { flex-wrap: wrap; }
.flex--center { align-items: center; justify-content: center; }
.flex--between { justify-content: space-between; }
.flex--around { justify-content: space-around; }
.flex--items-center { align-items: center; }
.flex--items-start { align-items: flex-start; }
.flex--items-end { align-items: flex-end; }
.flex--justify-center { justify-content: center; }
.flex--justify-start { justify-content: flex-start; }
.flex--justify-end { justify-content: flex-end; }

/* Button Base Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
    vertical-align: middle;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn--primary:hover:not(:disabled) {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary-light);
    text-decoration: none;
}

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

.btn--secondary:hover:not(:disabled) {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    text-decoration: none;
}

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

.btn--outline:hover:not(:disabled) {
    color: var(--color-white);
    background-color: var(--color-primary);
    text-decoration: none;
}

.btn--small {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

.btn--large {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

.btn--full {
    width: 100%;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
}

.form-label__required {
    color: var(--color-error);
    margin-left: var(--space-1);
}

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: #064E3B;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-base);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(64, 145, 108, 0.1);
}

.form-input:invalid,
.form-select:invalid,
.form-textarea:invalid {
    border-color: var(--color-error);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.input-group {
    display: flex;
    align-items: stretch;
}

.input-group__prefix,
.input-group__suffix {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray-600);
    background-color: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    white-space: nowrap;
}

.input-group__prefix {
    border-right: 0;
    border-top-left-radius: var(--radius-base);
    border-bottom-left-radius: var(--radius-base);
}

.input-group__suffix {
    border-left: 0;
    border-top-right-radius: var(--radius-base);
    border-bottom-right-radius: var(--radius-base);
}

.input-group .form-input {
    border-radius: 0;
}

.input-group .form-input:first-child {
    border-top-left-radius: var(--radius-base);
    border-bottom-left-radius: var(--radius-base);
}

.input-group .form-input:last-child {
    border-top-right-radius: var(--radius-base);
    border-bottom-right-radius: var(--radius-base);
}

/* Alert Components */
.alert {
    padding: var(--space-4);
    border-radius: var(--radius-base);
    margin-bottom: var(--space-4);
}

.alert--success {
    color: var(--color-primary);
    background-color: var(--color-light);
    border: 1px solid var(--color-success);
}

.alert--error {
    color: var(--color-error);
    background-color: #FEF2F2;
    border: 1px solid var(--color-error);
}

.alert--warning {
    color: var(--color-warning);
    background-color: #FFFBEB;
    border: 1px solid var(--color-warning);
}

.alert--info {
    color: var(--color-info);
    background-color: #EFF6FF;
    border: 1px solid var(--color-info);
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-gray-600 { color: var(--color-gray-600); }
.text-gray-700 { color: var(--color-gray-700); }

.bg-primary { background-color: var(--color-primary); }
.bg-light { background-color: var(--color-light); }
.bg-white { background-color: var(--color-white); }

.rounded { border-radius: var(--radius-base); }
.rounded-lg { border-radius: var(--radius-lg); }
.shadow { box-shadow: var(--shadow-base); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Responsive Utilities */
@media (max-width: 639px) {
    .hidden-mobile { display: none !important; }
}

@media (min-width: 640px) {
    .hidden-desktop { display: none !important; }
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-base);
    z-index: 1000;
}

.skip-link:focus {
    top: 6px;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
    
    .btn {
        border: 1px solid var(--color-gray-400);
        background: transparent !important;
        color: var(--color-gray-800) !important;
    }
}