/**
 * ফিশ কেয়ার সিস্টেম - Glassmorphism Theme
 * Main Stylesheet
 */

/* ১. CSS Variables - Design Tokens থেকে */
:root {
    /* Primary Colors (জলজ নীল-সবুজ) */
    --color-primary-50: #E0F7FA;
    --color-primary-100: #B2EBF2;
    --color-primary-500: #00BCD4;
    --color-primary-600: #00ACC1;
    --color-primary-700: #0097A7;
    
    /* Secondary Colors (পুকুর সবুজ) */
    --color-secondary-50: #E8F5E9;
    --color-secondary-500: #4CAF50;
    --color-secondary-600: #43A047;
    
    /* Neutral Colors */
    --color-neutral-50: #FAFBFF;
    --color-neutral-100: #F4F5F9;
    --color-neutral-200: #E8EAF0;
    --color-neutral-600: #6B7280;
    --color-neutral-900: #1D1D1F;
    
    /* Glass Colors */
    --color-glass-white: rgba(255, 255, 255, 0.4);
    --color-glass-border: rgba(255, 255, 255, 0.3);
    
    /* Semantic Colors */
    --color-success: #4CAF50;
    --color-warning: #FF9800;
    --color-error: #F44336;
    --color-info: #2196F3;
    
    /* Background Gradients */
    --bg-primary: linear-gradient(135deg, #E0F7FA 0%, #F0F4FA 50%, #FAFBFF 100%);
    --bg-hero: linear-gradient(135deg, #00BCD4 0%, #4CAF50 100%);
    --bg-dashboard: linear-gradient(135deg, #E8EFF8 0%, #F8FAFC 100%);
    
    /* Typography */
    --font-primary: 'Hind Siliguri', 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Font Sizes */
    --text-xl: 64px;
    --text-lg: 48px;
    --text-md: 32px;
    --text-sm: 24px;
    --text-base: 16px;
    --text-small: 14px;
    --text-xs: 12px;
    --text-data: 36px;
    
    /* Font Weights */
    --weight-light: 300;
    --weight-regular: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;
    
    /* Spacing (4pt grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    --space-16: 64px;
    --space-24: 96px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-glass-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-glass-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
    --shadow-float: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-inset: inset 0 1px 2px rgba(255, 255, 255, 0.3);
    
    /* Animation */
    --duration-fast: 200ms;
    --duration-normal: 300ms;
    --duration-slow: 400ms;
    --duration-slower: 600ms;
    --easing-default: ease-out;
    --easing-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ২. Reset এবং Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--weight-regular);
    line-height: 1.5;
    color: var(--color-neutral-900);
    background: var(--bg-primary);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* ৩. Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--weight-semibold);
    line-height: 1.3;
    margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-xl); font-weight: var(--weight-bold); line-height: 1.1; }
h2 { font-size: var(--text-lg); line-height: 1.2; }
h3 { font-size: var(--text-md); }
h4 { font-size: var(--text-sm); }

p {
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

a {
    color: var(--color-primary-600);
    text-decoration: none;
    transition: color var(--duration-fast) var(--easing-default);
}

a:hover {
    color: var(--color-primary-700);
}

/* ৪. Container এবং Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-wide {
    max-width: 1400px;
}

.main-content {
    min-height: calc(100vh - 72px - 200px); /* viewport - navbar - footer */
    padding: var(--space-16) 0;
}

/* ৫. Glass Navigation Bar */
.glass-navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 72px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px) saturate(180%);
    -webkit-backdrop-filter: blur(15px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-glass-sm);
    transition: background var(--duration-normal) var(--easing-default);
}

.glass-navbar.scrolled {
    background: rgba(255, 255, 255, 0.25);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 20px;
    font-weight: var(--weight-semibold);
    color: var(--color-neutral-900);
}

.nav-logo svg {
    width: 40px;
    height: 40px;
}

.logo-text {
    display: inline-block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-link {
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    color: var(--color-neutral-900);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--easing-default);
}

.nav-link:hover {
    background: rgba(0, 188, 212, 0.1);
    transform: scale(1.05);
}

.nav-user-dropdown {
    position: relative;
}

.nav-user-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-neutral-900);
    cursor: pointer;
    transition: all var(--duration-fast) var(--easing-default);
}

.nav-user-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    min-width: 180px;
    background: var(--color-glass-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--duration-normal) var(--easing-default);
}

.nav-user-dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--color-neutral-900);
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast) var(--easing-default);
}

.dropdown-item:hover {
    background: rgba(0, 188, 212, 0.1);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 3px;
    background: var(--color-neutral-900);
    border-radius: 2px;
    transition: all var(--duration-normal) var(--easing-default);
}

/* ৬. Flash Messages */
.flash-message {
    position: fixed;
    top: 80px;
    right: var(--space-6);
    z-index: 2000;
    max-width: 400px;
    padding: var(--space-4);
    background: var(--color-glass-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: var(--weight-medium);
    transition: opacity var(--duration-normal) var(--easing-default);
}

.flash-success {
    color: var(--color-success);
    border-left: 4px solid var(--color-success);
}

.flash-error {
    color: var(--color-error);
    border-left: 4px solid var(--color-error);
}

/* ৭. Glass Footer */
.glass-footer {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding: var(--space-12) 0 var(--space-6);
    margin-top: var(--space-16);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-section {
    color: var(--color-neutral-900);
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    margin-bottom: var(--space-4);
}

.footer-subtitle {
    font-size: 18px;
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-3);
}

.footer-text {
    font-size: var(--text-small);
    line-height: 1.6;
    color: var(--color-neutral-600);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    font-size: var(--text-small);
    color: var(--color-neutral-600);
    transition: color var(--duration-fast) var(--easing-default);
}

.footer-links a:hover {
    color: var(--color-primary-600);
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
    font-size: var(--text-small);
    color: var(--color-neutral-600);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--space-6);
    text-align: center;
    font-size: var(--text-small);
    color: var(--color-neutral-600);
}

.footer-credit {
    margin-top: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-1);
}

/* ৮. Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--color-primary-600); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-muted { color: var(--color-neutral-600); }

.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }