@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Light Theme (Default) */
    --bg-color: #f3f4f6;
    --bg-gradient: linear-gradient(135deg, #e0e7ff 0%, #f3f4f6 100%);
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: rgba(0, 0, 0, 0.05);
    
    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: #d1d5db;
    --input-text: #1f2937;
    
    --error-color: #ef4444;
    --success-color: #10b981;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-color: #111827;
    --bg-gradient: linear-gradient(135deg, #1e1b4b 0%, #111827 100%);
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    
    --glass-bg: rgba(31, 41, 55, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    
    --accent-color: #6366f1;
    --accent-hover: #818cf8;
    
    --input-bg: rgba(17, 24, 39, 0.8);
    --input-border: #374151;
    --input-text: #f9fafb;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px 0 var(--glass-shadow);
    border-radius: 16px;
    padding: 2rem;
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Forms & Inputs */
input[type="email"], 
input[type="text"], 
input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    margin-bottom: 1rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--input-text);
    font-family: 'Inter', sans-serif;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}

input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Buttons */
.btn {
    display: inline-block;
    width: 100%;
    padding: 0.75rem 1.5rem;
    background-color: var(--accent-color);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    text-align: center;
    text-decoration: none;
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(1px);
}

/* Theme Switcher */
.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    z-index: 100;
}

.theme-switch {
    display: inline-block;
    height: 28px;
    position: relative;
    width: 50px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 20px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 20px;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--accent-color);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Login Page Specific */
.login-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.login-box {
    max-width: 400px;
    width: 100%;
    animation: fadeIn 0.5s ease-out forwards;
}

.error-msg {
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.1);
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Dashboard Specific */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    margin: 2rem;
}

.dashboard-content {
    padding: 0 2rem 2rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px 0 var(--glass-shadow);
}

.card .btn {
    margin-top: 1.5rem;
}

.logout-link {
    color: var(--error-color);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

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

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}