/* login.css - Single Column Centered Login */
:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --accent-color: #10b981;
    --dark-color: #0f172a;
    --darker-color: #0a0f1c;
    --terminal-green: #10b981;
}

.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--dark-color) 0%, #0f172a 100%);
    display: flex;
    align-items: center;
    padding: 4rem 1rem;
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.login-container {
    background-color: rgba(30, 41, 59, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 3rem;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.4),
        0 0 100px rgba(99, 102, 241, 0.1);
    max-width: 500px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    z-index: 2;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
}

.login-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

.login-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    animation: shine 3s infinite;
}

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

.login-title {
    color: #f8fafc;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-size: 2.2rem;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(99, 102, 241, 0.2);
}

.login-subtitle {
    color: #94a3b8;
    font-size: 1.1rem;
    font-weight: 400;
}

/* Form Styles */
.form-label {
    color: #e2e8f0;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    font-size: 0.95rem;
}

.form-control {
    background-color: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: #f8fafc;
    padding: 0.875rem 1rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.form-control:focus {
    background-color: rgba(15, 23, 42, 0.9);
    border-color: var(--primary-color);
    color: #f8fafc;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: #64748b;
    font-weight: 400;
}

.input-group {
    position: relative;
}

.input-group-text {
    background-color: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-left: none;
    color: #94a3b8;
    padding: 0.875rem 1rem;
    border-radius: 0 12px 12px 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.input-group-text:hover {
    background-color: rgba(15, 23, 42, 0.9);
    color: var(--primary-color);
}

.input-group .form-control {
    border-right: none;
    border-radius: 12px 0 0 12px;
}

/* Login Button */
.login-btn {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    padding: 1rem;
    font-weight: 600;
    border-radius: 12px;
    width: 100%;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
    font-size: 1rem;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, var(--secondary-color), var(--primary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.login-btn:hover::before {
    opacity: 1;
}

.login-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.4);
}

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

.login-btn span {
    position: relative;
    z-index: 1;
}

/* Links */
.login-links {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(99, 102, 241, 0.15);
}

.login-links p {
    color: #94a3b8;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.login-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.login-link:hover {
    color: var(--secondary-color);
    text-decoration: none;
    gap: 0.75rem;
}

/* Flash Messages */
.alert {
    border: none;
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid transparent;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    border-left-color: #10b981;
}

.alert-error, .alert-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border-left-color: #ef4444;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
    border-left-color: #3b82f6;
}

/* Decorative Terminal Code */
.terminal-code {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: rgba(99, 102, 241, 0.3);
    white-space: nowrap;
    pointer-events: none;
    user-select: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .login-page {
        padding: 2rem 1rem;
    }
    
    .login-container {
        padding: 2.5rem 2rem;
        max-width: 400px;
    }
    
    .login-icon {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
    
    .login-title {
        font-size: 1.9rem;
    }
}

@media (max-width: 576px) {
    .login-container {
        padding: 2rem 1.5rem;
        border-radius: 20px;
    }
    
    .login-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .login-title {
        font-size: 1.7rem;
    }
    
    .login-subtitle {
        font-size: 1rem;
    }
    
    .form-control {
        padding: 0.75rem 0.875rem;
    }
}

/* Loading Animation */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
    margin-right: 8px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Form Validation Styles */
.form-control.is-invalid {
    border-color: #ef4444;
    background-color: rgba(239, 68, 68, 0.05);
}

.form-control.is-valid {
    border-color: #10b981;
    background-color: rgba(16, 185, 129, 0.05);
}

.invalid-feedback {
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

/* Password Strength Indicator */
.password-strength {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #64748b;
}

.strength-bar {
    height: 4px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 2px;
    margin-top: 0.25rem;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    background: linear-gradient(to right, #ef4444, #f59e0b, #10b981);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* Enhanced Navigation Styles */
.navbar {
    background-color: rgba(15, 23, 42, 0.95) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.15);
    padding: 0.8rem 0;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background-color: rgba(15, 23, 42, 0.98) !important;
    padding: 0.5rem 0;
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.8rem;
    color: white; /* Fallback color */
    font-family: 'JetBrains Mono', monospace;
    padding: 0.5rem 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    position: relative;
}

/* Fix for gradient text visibility */
.navbar-brand .brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
    position: relative;
    padding-bottom: 2px;
    text-shadow: 0 2px 10px rgba(99, 102, 241, 0.2);
}

/* Alternative approach - solid color with gradient shadow */
.navbar-brand .brand-text.alternative {
    color: white;
    text-shadow: 
        0 0 20px rgba(99, 102, 241, 0.5),
        0 0 40px rgba(139, 92, 246, 0.3);
}

.navbar-brand:hover {
    transform: translateY(-1px);
}

.navbar-brand:hover .brand-text {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    text-shadow: 0 5px 15px rgba(99, 102, 241, 0.3);
}

.brand-text::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
    border-radius: 1px;
}

.navbar-brand:hover .brand-text::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Code icon styling */
.navbar-brand .fa-code {
    font-size: 1.6rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    transition: all 0.3s ease;
}

.navbar-brand:hover .fa-code {
    transform: rotate(15deg) scale(1.1);
}

/* If gradient still not visible, use this solid color version */
.navbar-brand.solid .brand-text {
    color: white;
    position: relative;
}

.navbar-brand.solid .brand-text::before {
    content: 'IT CLUB';
    position: absolute;
    top: 0;
    left: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    z-index: 1;
    opacity: 0.7;
}

.nav-link-custom {
    color: #cbd5e1 !important;
    font-weight: 500;
    font-size: 1rem;
    padding: 0.75rem 1.25rem !important;
    border-radius: 10px;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
}

.nav-link-custom:hover {
    color: var(--primary-color) !important;
    background-color: rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.nav-link-custom.active {
    color: var(--primary-color) !important;
    background-color: rgba(99, 102, 241, 0.15);
    border-radius: 10px;
}

.nav-link-custom.active::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1.25rem;
    right: 1.25rem;
    height: 2px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 1px;
}

/* Login Button */
.btn-login {
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.25);
    position: relative;
    overflow: hidden;
}

.btn-login::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    color: white;
}

.btn-login:hover::before {
    left: 100%;
}

.btn-login:active {
    transform: translateY(0);
}

/* Mobile Menu */
.navbar-toggler {
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.navbar-toggler:hover {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.1);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    outline: none;
}

/* Mobile Menu Items */
@media (max-width: 991.98px) {
    .navbar-nav {
        padding: 1rem 0;
        background-color: rgba(30, 41, 59, 0.95);
        backdrop-filter: blur(10px);
        border-radius: 12px;
        margin-top: 1rem;
        padding: 1.5rem;
        border: 1px solid rgba(99, 102, 241, 0.2);
    }
    
    .nav-link-custom {
        margin-bottom: 0.5rem;
        justify-content: center;
    }
    
    .nav-item {
        margin: 0.5rem 0 !important;
    }
    
    .btn-login {
        width: 100%;
        justify-content: center;
        margin-top: 0.5rem;
    }
    
    /* Fix for mobile gradient visibility */
    .navbar-brand .brand-text {
        text-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
    }
}

/* Hover effect for navbar items */
.nav-link-custom i {
    transition: transform 0.3s ease;
}

.nav-link-custom:hover i {
    transform: translateY(-1px);
}

/* Active state animation */
.nav-link-custom.active i {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}