/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Inter', sans-serif;
}

/* Root Variables */
:root {
    --primary: #7c3aed;
    --secondary: #4f46e5;
    --text-dark: #1f2937;
    --text-light: #64748b;
    --hover-bg: rgba(243, 244, 246, 0.8);
    --accent: #10b981;
    --transition: all 0.3s cubic-bezier(.4,0,.2,1);
    --glass-bg-light: rgba(255, 255, 255, 0.3); /* Transparent with visible glass effect */
    --glass-bg-dark: rgba(0, 0, 0, 0.3); /* Transparent with visible glass effect */
    --glass-border-light: rgba(255, 255, 255, 0.5); /* Stronger border for visibility */
    --glass-border-dark: rgba(0, 0, 0, 0.5); /* Stronger border for visibility */
}

/* Navigation */
.main-nav {
    position: fixed;
    width: 100%;
    top: 0;
    background: var(--glass-bg-light);
    /* Removed backdrop-filter for transparent glass */
    z-index: 1000;
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); /* Enhanced shadow for glass depth */
    transition: background 0.3s ease;
}

.main-nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-img {
    height: 40px;
    transition: transform var(--transition);
}

.logo-img:hover {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background: var(--primary);
    transition: width 0.2s;
}

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

/* Auth Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: var(--glass-bg-light);
    /* Removed backdrop-filter for transparent glass */
    border: 1px solid var(--glass-border-light);
    border-radius: 1.5rem;
    padding: 2.5rem;
    max-width: 450px;
    margin: 0 auto;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1); /* Enhanced shadow for glass effect */
}

.auth-form:hover {
    transform: translateY(-5px);
}

.auth-form input {
    width: 100%;
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: 0.5rem;
    background: var(--glass-bg-light); /* Transparent glass effect */
    transition: var(--transition);
    color: var(--text-dark);
}

.auth-form input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
    transform: scale(1.02);
    background: rgba(255, 255, 255, 0.5); /* Slightly stronger on focus */
}

.auth-form button {
    background: var(--glass-bg-light); /* Transparent glass effect */
    /* Removed backdrop-filter for transparent glass */
    color: var(--text-dark);
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--glass-border-light);
    border-radius: 0.5rem;
    font-weight: 400; /* Non-bolded as per title style */
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.auth-form button:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.5); /* Stronger glass effect on hover */
}

.auth-form button.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent); /* No purple */
    animation: loadingAnimation 1.5s infinite;
    z-index: 1;
}

@keyframes loadingAnimation {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Dashboard Styles */
.progress-bar {
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    transition: var(--transition);
}

.progress-bar::after {
    content: '';
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary)); /* Kept for progress bar */
    border-radius: 4px;
    transition: width 0.5s ease;
}

.progress-bar:hover::after {
    filter: brightness(1.1);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    background: var(--glass-bg-light);
    /* Removed backdrop-filter for transparent glass */
    border: 1px solid var(--glass-border-light);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1); /* Enhanced shadow for glass effect */
}

/* General Container Styles */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    background: var(--glass-bg-light);
    /* Removed backdrop-filter for transparent glass */
    border: 1px solid var(--glass-border-light);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1); /* Enhanced shadow for glass effect */
}

/* Error and Success Messages */
.error-message, .success-message {
    padding: 0.75rem;
    border-radius: 0.5rem;
    text-align: center;
    margin-top: 1rem;
    display: none;
    background: var(--glass-bg-light); /* Transparent glass effect */
    /* Removed backdrop-filter for transparent glass */
    border: 1px solid var(--glass-border-light);
}

.error-message {
    background: rgba(254, 226, 226, 0.3); /* Adjusted for visibility */
    color: #dc2626;
}

.success-message {
    background: rgba(209, 250, 229, 0.3); /* Adjusted for visibility */
    color: #059669;
}

/* Loading Spinner */
.loading-spinner {
    border: 4px solid rgba(243, 243, 243, 0.3); /* Adjusted for visibility */
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
    display: none;
    background: var(--glass-bg-light); /* Transparent glass effect */
    /* Removed backdrop-filter for transparent glass */
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading .loading-spinner {
    display: block;
}

/* Fallback Styles (if Tailwind fails) */
body:not(.tailwind-loaded) .main-nav,
body:not(.tailwind-loaded) .container,
body:not(.tailwind-loaded) .auth-form input,
body:not(.tailwind-loaded) .auth-form button,
body:not(.tailwind-loaded) .dashboard-grid > * {
    background: var(--glass-bg-light);
    /* Removed backdrop-filter for transparent glass */
    border: 1px solid var(--glass-border-light);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); /* Enhanced shadow */
}

body:not(.tailwind-loaded) .auth-form input {
    border: 2px solid transparent;
    padding: 10px;
    margin: 5px 0;
    background: var(--glass-bg-light); /* Transparent glass effect */
}

body:not(.tailwind-loaded) .auth-form button {
    background: var(--glass-bg-light);
    /* Removed backdrop-filter for transparent glass */
    color: var(--text-dark);
    padding: 10px;
    border: 1px solid var(--glass-border-light);
    cursor: pointer;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-nav {
        padding: 0.7rem 1rem;
        background: var(--glass-bg-light);
        /* Removed backdrop-filter for transparent glass */
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); /* Enhanced shadow */
    }

    .nav-menu {
        gap: 1rem;
        display: none; /* Hidden by default on mobile, toggle with JS if needed */
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        right: 1rem;
        left: 1rem;
        background: var(--glass-bg-light);
        /* Removed backdrop-filter for transparent glass */
        border: 1px solid var(--glass-border-light);
        border-radius: 0.7rem;
        padding: 1rem;
        z-index: 1001;
    }

    .nav-menu a {
        font-size: 0.9rem;
        padding: 0.5rem 0;
    }

    .logo-img {
        height: 28px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0.5rem;
    }

    .auth-form {
        padding: 1.5rem;
        gap: 1rem;
    }

    .auth-form input,
    .auth-form button {
        padding: 0.75rem;
        min-height: 50px;
        font-size: 1rem;
    }

    .auth-form button {
        background: var(--glass-bg-light);
        /* Removed backdrop-filter for transparent glass */
        border: 1px solid var(--glass-border-light);
    }

    .auth-form button:hover {
        background: rgba(255, 255, 255, 0.5); /* Stronger glass effect on hover */
    }

    .auth-form button.loading::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent); /* No purple */
        animation: loadingAnimation 1.5s infinite;
        z-index: 1;
    }
}

@media (max-width: 640px) {
    .logo-img {
        height: 24px;
    }

    .nav-menu a {
        font-size: 0.85rem;
    }

    .auth-form input,
    .auth-form button {
        padding: 0.6rem;
        min-height: 45px;
    }
}