/* ============================================
   CSS VARIABLES (TOKENS) FOR LIGHT MODE
   ============================================ */

:root {
    /* ===== BACKGROUND COLORS ===== */
    --bg-primary: #ffffff;
    --bg-secondary: #f9f9f9;
    --bg-tertiary: #f0f0f0;
    
    /* ===== TEXT COLORS ===== */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --text-inverse: #ffffff;
    --text-light: #f9fafb;
    
    /* ===== BRAND/ACCENT COLORS ===== */
    --primary: #6a11cb;
    --primary-hover: #5800c4;
    --primary-light: #8b4de8;
    --primary-dark: #4f0aa3;
    
    --secondary: #2575fc;
    --secondary-hover: #1a68e3;
    
    --success: #28a745;
    --success-hover: #218838;
    
    --danger: #ff416c;
    --danger-hover: #e03158;
    
    --warning: #ffc107;
    --warning-hover: #e0a800;
    
    --info: #17a2b8;
    
    /* ===== EPULSE SPECIFIC ===== */
    --epulse-color-primary: #4f46e5;
    --epulse-color-primary-light: #6366f1;
    --epulse-color-primary-lighter: #818cf8;
    --epulse-color-success: #10b981;
    --epulse-color-error: #ef4444;
    --epulse-color-background-light: #f9fafb;
    --epulse-color-background-page: #ffffff;
    --epulse-color-text-primary: #1f2937;
    --epulse-color-text-secondary: #6b7280;
    --epulse-color-border: #e5e7eb;
    
    /* ===== UI ELEMENTS ===== */
    --border-color: #dddddd;
    --border-light: #eeeeee;
    --border-dark: #cccccc;
    --divider: rgba(0,0,0,0.1);
    
    /* ===== SHADOWS ===== */
    --shadow-sm: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    --shadow-md: 0 1rem 3rem rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 0.5rem 2rem rgba(0, 0, 0, 0.1);
    --shadow-epulse-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-epulse-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.07), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    
    /* ===== LAYOUT & SPACING ===== */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50px;
    
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    
    --max-width: 1200px;
    
    /* ===== TYPOGRAPHY ===== */
    --font-sans: 'Space Grotesk', sans-serif;
    --font-mono: 'Courier New', monospace;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 1.75rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.4rem;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.75;
    
    /* ===== TRANSITIONS ===== */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.4s ease;
    
    /* ===== EFFECTS ===== */
    --blur: blur(5px);
}

/* ============================================
   DARK MODE OVERRIDES
   ============================================ */

.darkmode {
    /* ===== BACKGROUND COLORS ===== */
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f26;
    --bg-tertiary: #242a33;
    
    /* ===== TEXT COLORS ===== */
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;
    --text-inverse: #000000;
    --text-light: #f8f9fa;
    
    /* ===== BRAND/ACCENT COLORS ===== */
    --primary: #8a2be2;
    --primary-hover: #9b42f5;
    --primary-light: #a566ff;
    --primary-dark: #7209b7;
    
    --secondary: #4da3ff;
    --secondary-hover: #70b5ff;
    
    --success: #2ecc71;
    --success-hover: #25a25a;
    
    --danger: #ff6b8b;
    --danger-hover: #ff8fa3;
    
    --warning: #ffd166;
    --warning-hover: #ffc233;
    
    --info: #3498db;
    
    /* ===== EPULSE SPECIFIC ===== */
    --epulse-color-primary: #6366f1;
    --epulse-color-primary-light: #818cf8;
    --epulse-color-primary-lighter: #a5b4fc;
    --epulse-color-success: #10b981;
    --epulse-color-error: #f87171;
    --epulse-color-background-light: #1a1f26;
    --epulse-color-background-page: #0f1419;
    --epulse-color-text-primary: #e9ecef;
    --epulse-color-text-secondary: #adb5bd;
    --epulse-color-border: #343a40;
    
    /* ===== UI ELEMENTS ===== */
    --border-color: #343a40;
    --border-light: #2d3339;
    --border-dark: #495057;
    --divider: rgba(255,255,255,0.1);
    
    /* ===== SHADOWS ===== */
    --shadow-sm: 0 0.5rem 1rem rgba(0, 0, 0, 0.3);
    --shadow-md: 0 1rem 3rem rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 0.5rem 2rem rgba(0, 0, 0, 0.4);
    --shadow-epulse-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    --shadow-epulse-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    
    /* ===== EFFECTS ===== */
    --blur: blur(10px);
}

/* ============================================
   BASE STYLES
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;700&display=swap');

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Space Grotesk', sans-serif;
    text-decoration: none;
    outline: none;
    border: none;
    transition: var(--transition-fast);
}

/* FIXED: Changed from 50% to 100% for proper font sizing */
html {
    font-size: 100% !important;
    scroll-behavior: smooth !important;
    box-sizing: border-box !important;
}

body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: var(--line-height-normal);
    font-size: var(--font-size-base);
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none !important;
    color: var(--primary);
    transition: var(--transition-fast);
}

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

/* Utility Classes */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ============================================
   HEADER STYLES
   ============================================ */

.site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg) 2%;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.site-header .flex {
    width: 100%;
}

.brand-logo {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: transform 0.3s ease;
}

.brand-logo:hover {
    transform: scale(1.05);
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    margin: 0 var(--space-lg);
    position: relative;
}

.nav-link {
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 500;
    padding: var(--space-sm) 0;
    position: relative;
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -0.3125rem;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link:hover::after {
    width: 100%;
}

/* Action Icons */
.action-icons {
    display: flex;
    align-items: center;
}

.action-icon {
    margin-left: var(--space-xl);
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-normal);
    position: relative;
}

.action-icon:hover {
    color: var(--primary);
    transform: translateY(-0.1875rem);
}

/* Theme Toggle Specific */
.theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    padding: var(--space-sm);
    border-radius: var(--radius-full);
}

.theme-toggle:hover {
    color: var(--primary);
    background-color: var(--bg-tertiary);
}

.theme-toggle .theme-icon {
    font-size: var(--font-size-xl);
}

/* Dark mode icon adjustments */
.darkmode .theme-toggle .fa-moon::before {
    content: "\f185"; /* Sun icon in dark mode */
}

.hamburger-menu {
    display: none;
    font-size: var(--font-size-2xl);
    margin-left: -2.75rem;
}

/* User Dropdown */
.user-dropdown {
    position: absolute;
    top: 100%;
    right: 2rem;
    width: 30rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-xl);
    text-align: center;
    transform-origin: top right;
    transform: scale(0);
    opacity: 0;
    transition: var(--transition-normal);
    z-index: 1000;
    border: 1px solid var(--border-color);
}

.user-dropdown.active {
    transform: scale(1);
    opacity: 1;
}

.user-dropdown p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-lg);
    color: var(--text-primary);
    font-weight: 500;
}

.user-dropdown .button {
    display: block;
    width: 100%;
    margin: var(--space-md) 0;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    transition: var(--transition-normal);
    border: none;
}

.primary-button {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-inverse);
}

.primary-button:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--secondary-hover) 100%);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.2);
    transform: translateY(-0.1875rem);
    color: var(--text-inverse) !important;
    text-decoration: none !important;
}

.secondary-button {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.secondary-button:hover {
    background: var(--border-color);
    color: var(--text-primary) !important;
    text-decoration: none !important;
}

.danger-button {
    background: linear-gradient(135deg, var(--danger) 0%, #ff4b2b 100%);
    color: var(--text-inverse);
}

.danger-button:hover {
    background: linear-gradient(135deg, var(--danger-hover) 0%, #e73c1e 100%);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.2);
    color: var(--text-inverse) !important;
    text-decoration: none !important;
}

/* ============================================
   AUTHENTICATION MODAL
   ============================================ */

.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: var(--blur);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.darkmode .auth-overlay {
    background: rgba(0, 0, 0, 0.7);
}

.auth-overlay.active {
    opacity: 1;
    visibility: visible;
}

.auth-box {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    width: 40rem;
    max-width: 90%;
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    transform: translateY(-3.125rem);
    opacity: 0;
    transition: var(--transition-slow);
    border: 1px solid var(--border-color);
}

.auth-overlay.active .auth-box {
    transform: translateY(0);
    opacity: 1;
}

.auth-close {
    position: absolute;
    top: var(--space-xl);
    right: var(--space-xl);
    font-size: 2.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-normal);
}

.auth-close:hover {
    color: var(--danger);
    transform: rotate(90deg);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.auth-logo {
    width: 8rem;
    margin-bottom: var(--space-lg);
}

.auth-title {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.auth-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.input-field {
    position: relative;
    margin-bottom: var(--space-lg);
}

.input-field input {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.input-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0.5rem rgba(106, 17, 203, 0.3);
}

.input-field label {
    position: absolute;
    top: 50%;
    left: var(--space-lg);
    transform: translateY(-50%);
    font-size: var(--font-size-base);
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition-normal);
}

.input-field input:focus + label,
.input-field input:not(:placeholder-shown) + label {
    top: 0;
    left: var(--space-md);
    font-size: var(--font-size-sm);
    background: var(--bg-primary);
    padding: 0 var(--space-sm);
    color: var(--primary);
}

.password-field {
    position: relative;
}

.password-toggle {
    position: absolute;
    top: 50%;
    right: var(--space-lg);
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--text-muted);
    font-size: var(--font-size-base);
    transition: var(--transition-normal);
}

.password-toggle:hover {
    color: var(--primary);
}

.auth-button {
    width: 100%;
    padding: var(--space-md);
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: var(--text-inverse);
    font-size: var(--font-size-md);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    margin-top: var(--space-md);
    border: none;
}

.auth-button:hover {
    background: linear-gradient(135deg, var(--primary-hover) 0%, var(--secondary-hover) 100%);
    box-shadow: 0 0.5rem 1.5rem rgba(106, 17, 203, 0.4);
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-xl);
}

.auth-link {
    color: var(--primary);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: var(--transition-normal);
}

.auth-link:hover {
    text-decoration: underline;
    color: var(--primary-hover);
}

/* ============================================
   NOTIFICATION
   ============================================ */

.notification {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    background: var(--bg-primary);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 9999;
    animation: slideIn 0.3s ease forwards;
    border: 1px solid var(--border-color);
}

.notification span {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    margin-right: var(--space-xl);
}

.notification i {
    cursor: pointer;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    transition: var(--transition-normal);
}

.notification i:hover {
    color: var(--danger);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ============================================
   SITE FOOTER
   ============================================ */

.site-footer {
    background-color: var(--epulse-color-background-page);
    padding: var(--space-xl) var(--space-xl);
    border-top: 1px solid var(--epulse-color-border);
    text-align: center;
}

.site-footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: left;
}

.site-footer__column-title {
    font-size: var(--font-size-xl);
    color: var(--epulse-color-primary);
    margin-bottom: var(--space-lg);
    text-transform: capitalize;
    font-weight: 600;
}

.site-footer__link {
    display: block;
    font-size: var(--font-size-base);
    color: var(--epulse-color-text-secondary);
    padding: var(--space-sm) 0;
    transition: var(--transition-fast);
}

.site-footer__link:hover {
    color: var(--epulse-color-primary);
    transform: translateX(0.25rem);
    text-decoration: none;
}

.site-footer__link i {
    margin-right: var(--space-md);
    width: 1.5em;
    text-align: center;
    transition: transform 0.3s ease;
}

.site-footer__link:hover i {
    transform: rotate(5deg);
}

.site-footer__credits {
    grid-column: 1 / -1;
    padding-top: var(--space-lg);
    margin-top: var(--space-lg);
    border-top: 1px solid var(--epulse-color-border);
    font-size: var(--font-size-base);
    color: var(--epulse-color-text-secondary);
}

.site-footer__credits-brand {
    color: var(--epulse-color-primary);
    font-weight: 600;
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */

.scroll-to-top-button {
    position: fixed;
    bottom: 2.5rem;
    right: 2.5rem;
    background-color: var(--epulse-color-primary);
    color: var(--epulse-color-background-page);
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(1.25rem);
    transition: var(--transition-normal), transform 0.3s ease;
    z-index: 1000;
    box-shadow: var(--shadow-epulse-medium);
}

.scroll-to-top-button.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top-button:hover {
    background-color: var(--epulse-color-primary-light);
    transform: translateY(-0.1875rem) scale(1.05);
    box-shadow: 0 0.5rem 1.25rem rgba(0,0,0,0.15);
}

.scroll-to-top-button i {
    font-size: 2.2rem;
}

/* ============================================
   RESPONSIVE STYLES
   ============================================ */

@media (max-width: 991px) {
    .nav-list {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        display: none;
        flex-direction: column;
        padding: var(--space-md) 0;
        box-shadow: var(--shadow-sm);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .nav-item {
        width: 100%;
        margin: 0;
        padding: var(--space-md) var(--space-xl);
        text-align: center;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .hamburger-menu {
        display: block;
    }
    
    h1 { font-size: 2.125rem; } /* 34px converted */
    h2 { font-size: 1.75rem; } /* 28px converted */
    h3 { font-size: 1.5625rem; } /* 25px converted */
}

@media (max-width: 768px) {
    .user-dropdown {
        width: 25rem;
    }
    
    .page-content-wrapper { padding: var(--space-lg) var(--space-lg); }
    .auth-form-card { padding: var(--space-lg) var(--space-xl); }
}

@media (max-width: 576px) {
    .action-icon {
        margin-left: var(--space-lg);
    }
    
    .user-dropdown {
        width: 90%;
        right: 5%;
    }
    
    .page-content-wrapper { padding: 1.5625rem var(--space-md); } /* 25px converted */
    .auth-form-card { padding: 1.5625rem var(--space-lg); } /* 25px converted */
    .auth-form-card__title { 
        font-size: 1.5rem; /* 24px = 1.5rem */
        margin-bottom: var(--space-xl); 
    }
    
    .site-footer__column-title { 
        font-size: 1.1875rem; /* 19px = 1.1875rem */
    }
    .site-footer__link { 
        font-size: 0.96875rem; /* 15.5px = 0.96875rem */
    }
    .site-footer__credits { 
        font-size: 0.9375rem; /* 15px = 0.9375rem */
    }
    .scroll-to-top-button { 
        width: 4.5rem; 
        height: 4.5rem; 
        bottom: 1.5rem; 
        right: 1.5rem; 
    }
    .scroll-to-top-button i { 
        font-size: 2rem; 
    }
}

/* ============================================
   FORM STYLES (Additional)
   ============================================ */

.form-input-field {
    padding: var(--space-lg);
    font-size: var(--font-size-md);
}

.button-base {
    padding: var(--space-md) 2.5rem;
    font-size: var(--font-size-md);
}

.form-feedback-message {
    font-size: var(--font-size-base);
    padding: var(--space-md);
}

/* ============================================
   DARK MODE SPECIFIC ENHANCEMENTS
   ============================================ */

.darkmode img {
    filter: brightness(0.9);
}

.darkmode .notification {
    background: var(--bg-secondary);
    border-color: var(--border-dark);
}

.darkmode .scroll-to-top-button {
    background-color: var(--epulse-color-primary-light);
}

.darkmode .scroll-to-top-button:hover {
    background-color: var(--epulse-color-primary-lighter);
}

/* ============================================
   ANIMATION FOR SMOOTHER THEME TRANSITIONS
   ============================================ */

/* Exclude certain elements from transitions during theme change */
.darkmode-transition *:not(.no-transition):not([data-no-transition]),
.darkmode-transition *:not(.no-transition):not([data-no-transition])::before,
.darkmode-transition *:not(.no-transition):not([data-no-transition])::after {
    transition: background-color 0.3s ease, 
                border-color 0.3s ease,
                color 0.3s ease,
                fill 0.3s ease,
                stroke 0.3s ease !important;
}

@media (max-width: 991px) {
    .site-header {
        padding: var(--space-md) 2%;
    }
    
    .site-header .flex {
        align-items: center;
        gap: var(--space-md);
    }
    
    .brand-logo {
        font-size: var(--font-size-3xl); /* Reduce from 4xl */
    }
    
    .main-nav {
        flex: 1;
        display: flex;
        justify-content: flex-end;
    }
    
    .hamburger-menu {
        display: block;
        margin-left: 0; /* Remove negative margin */
        order: 1; /* Place hamburger first */
    }
    
    .action-icons {
        margin-left: auto;
        gap: var(--space-md);
    }
    
    .action-icon {
        margin-left: 0;
        font-size: var(--font-size-lg); /* Slightly smaller */
    }
    
    /* Existing nav-list styles... */
}

@media (max-width: 576px) {
    .site-header {
        padding: var(--space-sm) 2%;
    }
    
    .brand-logo {
        font-size: var(--font-size-2xl);
    }
    
    .action-icon {
        margin-left: 0;
        font-size: var(--font-size-base);
        padding: var(--space-xs);
    }
    
    .theme-toggle {
        padding: var(--space-xs);
    }
    
    .hamburger-menu {
        font-size: var(--font-size-xl);
    }
}