/* Global Styles */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #eef2ff;
    --secondary-color: #8b5cf6;
    --secondary-hover: #7c3aed;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --border-color: #e2e8f0;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --box-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.65;
    color: var(--text-primary);
    background-color: var(--light-color);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 20%);
    background-attachment: fixed;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

header:hover {
    box-shadow: var(--box-shadow-lg);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    letter-spacing: -0.5px;
}

/* Navigation */
nav ul {
    list-style: none;
    display: flex;
    gap: 24px;
    align-items: center;
}

nav a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    padding: 10px 16px;
    border-radius: var(--border-radius);
    position: relative;
    font-size: 0.95rem;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
    transform: translateX(-50%);
    border-radius: 2px;
}

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

nav a:hover::after {
    width: 60%;
}

nav a.active {
    color: var(--primary-color);
    font-weight: 600;
}

nav a.active::after {
    width: 60%;
}

/* Main Content */
main {
    padding: 40px 0;
    min-height: calc(100vh - 180px);
}

/* Hero Section */
.hero {
    text-align: center;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 80px 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-lg);
    margin-bottom: 50px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.03) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

.hero > * {
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -1px;
    line-height: 1.2;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* Actions */
.actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

/* Features Section */
.features {
    margin-top: 80px;
    position: relative;
}

.features h3 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.features h3::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 20px auto 0;
    border-radius: 2px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-item {
    background: #fff;
    padding: 40px 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-xl);
    border-color: var(--primary-color);
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-item h4 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-item h4::before {
    content: '';
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
}

.feature-item:nth-child(1) h4::before {
    content: '👤';
}

.feature-item:nth-child(2) h4::before {
    content: '🔒';
}

.feature-item:nth-child(3) h4::before {
    content: '📊';
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Form Section */
.form-section {
    max-width: 500px;
    margin: 0 auto;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 48px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-xl);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.form-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.form-section h2 {
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Form Styles */
.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group .form-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: var(--transition);
    z-index: 1;
}

.form-group .form-control {
    padding-left: 48px;
}

.form-group .form-control:focus + .form-icon {
    color: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: #fff;
    color: var(--text-primary);
    font-family: inherit;
}

.form-control::placeholder {
    color: var(--text-muted);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.form-control:focus::placeholder {
    opacity: 0.6;
    transform: translateX(4px);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
    transform: translateY(-1px);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.invalid-feedback::before {
    content: '⚠️';
    font-size: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background-color: transparent;
    font-family: inherit;
    position: relative;
    overflow: hidden;
    z-index: 1;
    box-shadow: var(--box-shadow);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.2) 100%);
    transform: translateX(-100%);
    transition: var(--transition);
    z-index: -1;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--box-shadow);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4), 0 10px 10px -5px rgba(99, 102, 241, 0.2);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: #fff;
}

.btn-secondary:hover {
    box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.4), 0 10px 10px -5px rgba(59, 130, 246, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 12px 26px;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4), 0 10px 10px -5px rgba(99, 102, 241, 0.2);
}

/* Button groups */
.btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-group .btn {
    flex: 1;
    min-width: 140px;
}

/* Alert Styles */
.alert {
    padding: 16px 24px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    font-size: 0.95rem;
    font-weight: 500;
    border: 1px solid transparent;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: currentColor;
}

.alert::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.2) 100%);
    opacity: 0;
    transition: var(--transition);
}

.alert:hover::after {
    opacity: 1;
}

.alert-danger {
    background-color: #fef2f2;
    color: #dc2626;
    border-color: #fee2e2;
}

.alert-success {
    background-color: #f0fdf4;
    color: #16a34a;
    border-color: #dcfce7;
}

.alert-warning {
    background-color: #fffbeb;
    color: #f59e0b;
    border-color: #fef3c7;
}

.alert-info {
    background-color: #eff6ff;
    color: #2563eb;
    border-color: #dbeafe;
}

.alert-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

/* Profile Section */
.profile-section {
    max-width: 600px;
    margin: 0 auto;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 48px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-xl);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.profile-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.profile-section h2 {
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.profile-info {
    background: #fff;
    padding: 36px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.info-item:hover {
    background: rgba(99, 102, 241, 0.02);
    transform: translateX(4px);
}

.info-item:last-child {
    border-bottom: none;
}

.info-item label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.info-item label::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
}

.info-item span {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 500;
    background: var(--primary-light);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--dark-color) 0%, #0f172a 100%);
    color: #fff;
    padding: 50px 0 30px;
    text-align: center;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 20%);
}

footer .container {
    position: relative;
    z-index: 1;
}

footer p {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.6;
}

footer .footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
}

footer .footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    justify-content: center;
}

footer .footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
}

footer .footer-links a:hover {
    color: #fff;
    background: rgba(99, 102, 241, 0.2);
    transform: translateY(-2px);
}

footer .copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    margin-top: 20px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive Design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }

    nav a {
        padding: 8px 12px;
        font-size: 0.9rem;
    }

    .hero {
        padding: 60px 20px;
    }

    .hero h2 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .features {
        margin-top: 60px;
    }

    .features h3 {
        font-size: 1.8rem;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .feature-item {
        padding: 32px 24px;
    }

    .form-section {
        padding: 32px 20px;
        margin: 0 10px;
    }

    .form-section h2 {
        font-size: 1.75rem;
    }

    .profile-section {
        padding: 32px 20px;
        margin: 0 10px;
    }

    .profile-section h2 {
        font-size: 1.75rem;
    }

    .actions {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .btn {
        width: 100%;
        max-width: 320px;
        padding: 14px 24px;
    }

    main {
        padding: 30px 0;
    }

    footer {
        padding: 40px 0 20px;
        margin-top: 60px;
    }

    footer .footer-links {
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .features h3 {
        font-size: 1.5rem;
    }

    .feature-item h4 {
        font-size: 1.3rem;
    }

    .info-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 16px 0;
    }

    .info-item span {
        margin-left: 0;
        width: 100%;
        text-align: left;
    }

    .alert {
        padding: 14px 16px;
        font-size: 0.9rem;
    }

    .form-control {
        padding: 12px 14px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 0.95rem;
    }
}

/* Additional Utility Classes */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--primary-color);
}

.text-secondary {
    color: var(--text-secondary);
}

.text-muted {
    color: var(--text-muted);
}

.mb-0 {
    margin-bottom: 0;
}

.mb-1 {
    margin-bottom: 0.25rem;
}

.mb-2 {
    margin-bottom: 0.5rem;
}

.mb-3 {
    margin-bottom: 1rem;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

.mb-5 {
    margin-bottom: 3rem;
}

.mt-0 {
    margin-top: 0;
}

.mt-1 {
    margin-top: 0.25rem;
}

.mt-2 {
    margin-top: 0.5rem;
}

.mt-3 {
    margin-top: 1rem;
}

.mt-4 {
    margin-top: 1.5rem;
}

.mt-5 {
    margin-top: 3rem;
}

/* Animation classes */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Loading spinner */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(99, 102, 241, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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