/* ============================================
   Modern Production-Ready Styles
   ============================================ */

/* Root Variables for Theming */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --card-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 15px 50px rgba(0, 0, 0, 0.15);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 1.5rem;
    --border-radius-md: 1rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #2d3748;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.05" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,101.3C1248,85,1344,75,1392,69.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    pointer-events: none;
    z-index: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: #1a202c;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

/* Card Styles */
.card {
    border-radius: var(--border-radius-lg);
    border: none;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: var(--card-shadow);
    transition: var(--transition-smooth);
    animation: fadeInUp 0.6s ease-out;
}

.card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-5px);
}

/* Button Styles */
.btn {
    border-radius: 0.75rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.02em;
    transition: var(--transition-smooth);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
    color: white;
}

.btn-outline-secondary {
    border: 2px solid #e2e8f0;
    color: #4a5568;
    background: white;
}

.btn-outline-secondary:hover {
    background: #f7fafc;
    border-color: #cbd5e0;
    color: #2d3748;
    transform: translateY(-2px);
}

.btn-outline-primary {
    border: 2px solid #667eea;
    color: #667eea;
    background: transparent;
}

.btn-outline-primary:hover {
    background: #667eea;
    color: white;
}

.btn-outline-danger {
    border: 2px solid #f56565;
    color: #f56565;
    background: transparent;
}

.btn-outline-danger:hover {
    background: #f56565;
    color: white;
}

/* Form Styles */
.form-label {
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.form-control {
    border-radius: 0.75rem;
    border: 2px solid #e2e8f0;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: var(--transition-smooth);
    background: #f7fafc;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
    outline: none;
}

.form-control::placeholder {
    color: #a0aec0;
}

/* Navbar Styles */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 1rem 0;
    transition: var(--transition-smooth);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition-smooth);
    letter-spacing: -0.02em;
}

.navbar-brand:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

/* Alert Styles */
.alert {
    border-radius: var(--border-radius-md);
    border: none;
    padding: 1.25rem;
    animation: slideInDown 0.4s ease-out;
}

.alert-danger {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    color: white;
    font-weight: 500;
}

.alert-success {
    background: linear-gradient(135deg, #51cf66 0%, #40c057 100%);
    color: white;
    font-weight: 500;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast-notification {
    background: white;
    border-radius: var(--border-radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--card-shadow);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideInRight 0.4s ease-out;
    min-width: 300px;
}

.toast-notification.success {
    border-left: 4px solid #51cf66;
}

.toast-notification.error {
    border-left: 4px solid #ff6b6b;
}

.toast-notification.info {
    border-left: 4px solid #667eea;
}

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease-out;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* CV/Content Styles */
#cv {
    padding: 1.5rem 0;
}

#cv h1 {
    color: #667eea;
    border-bottom: 3px solid #667eea;
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
    margin-top: 2rem;
    font-size: 1.75rem;
}

#cv h1:first-child {
    margin-top: 0;
}

#cv h2 {
    color: #764ba2;
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

#cv .item {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 1.25rem;
    margin: 1rem 0;
    border-radius: var(--border-radius-md);
    border-left: 4px solid #667eea;
    transition: var(--transition-smooth);
}

#cv .item:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
}

#cv .time {
    font-style: italic;
    color: #718096;
    font-size: 0.9rem;
}

#cv ul {
    list-style: none;
    padding-left: 0;
}

#cv ul li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    position: relative;
}

#cv ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

#cv p {
    margin-bottom: 0.75rem;
    color: #4a5568;
    line-height: 1.7;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-10px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(10px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

/* Info Alert Animation */
.alert-info {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border: none;
    animation: fadeInUp 0.6s ease-out;
}

.alert-info strong {
    font-weight: 700;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .card {
        border-radius: var(--border-radius-md);
    }

    .toast-notification {
        min-width: 250px;
    }
}

/* Utility Classes */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-blur {
    backdrop-filter: blur(20px);
    background: rgba(255, 255, 255, 0.95);
}

.shadow-smooth {
    box-shadow: var(--card-shadow);
}

.transition-smooth {
    transition: var(--transition-smooth);
}

/* Link Styles */
a {
    color: #667eea;
    text-decoration: none;
    transition: var(--transition-smooth);
    font-weight: 500;
}

a:hover {
    color: #764ba2;
    text-decoration: none;
}

/* Focus Visible for Accessibility */
*:focus-visible {
    outline: 3px solid #667eea;
    outline-offset: 2px;
}