:root {
    --primary: #6bb3d9;
    --primary-rgb: 107, 179, 217;
    --primary-light: #a8d5eb;
    --primary-dark: #4a9cc8;
    --accent: #f5d76e;
    --accent-rgb: 245, 215, 110;
    --accent-light: #f9e8a6;
    --accent-dark: #e6c54a;
    --bg-color: #fefcf6;
    --bg-gradient-start: #fefcf6;
    --bg-gradient-end: #f4f9fc;
    --card-bg: #ffffff;
    --card-bg-light: #fafbfc;
    --text-color: #3d4f5f;
    --text-light: #6b7c8e;
    --dark-gray: #8a9aab;
    --border-color: #e8eef3;
    --border-light: #f0f4f8;
    --sidebar-bg: #2d3e50;
    --sidebar-hover: #3a4d63;
    --transition: all 0.3s cubic-bezier(0.215, 0.61, 0.355, 1);
    --ease-out-cubic: cubic-bezier(0.215, 0.61, 0.355, 1);
    --ease-out-quart: cubic-bezier(0.165, 0.84, 0.44, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    --anim-duration-fast: 0.3s;
    --anim-duration-normal: 0.6s;
    --anim-duration-slow: 0.8s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
}

a {
    color: var(--primary);
    transition: var(--transition);
    text-decoration: none;
}

a:hover {
    color: var(--primary-dark);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px) rotate(-1.5deg);
    }
    60% {
        opacity: 1;
        transform: translateY(-6px) rotate(0.5deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) rotate(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-40px) rotate(1.5deg);
    }
    60% {
        opacity: 1;
        transform: translateY(6px) rotate(-0.5deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) rotate(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px) skewX(-3deg);
    }
    60% {
        opacity: 1;
        transform: translateX(4px) skewX(1deg);
    }
    to {
        opacity: 1;
        transform: translateX(0) skewX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px) skewX(3deg);
    }
    60% {
        opacity: 1;
        transform: translateX(-4px) skewX(-1deg);
    }
    to {
        opacity: 1;
        transform: translateX(0) skewX(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.96);
    }
    60% {
        opacity: 1;
        transform: translateY(-5px) scale(1.01);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-40px) scale(0.96);
    }
    60% {
        opacity: 1;
        transform: translateY(5px) scale(1.01);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideLeft {
    from {
        opacity: 0;
        transform: translateX(40px) scale(0.96);
    }
    60% {
        opacity: 1;
        transform: translateX(-4px) scale(1.01);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes slideRight {
    from {
        opacity: 0;
        transform: translateX(-40px) scale(0.96);
    }
    60% {
        opacity: 1;
        transform: translateX(4px) scale(1.01);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.85) rotate(-3deg);
    }
    60% {
        opacity: 1;
        transform: scale(1.04) rotate(1deg);
    }
    to {
        opacity: 1;
        transform: scale(1) rotate(0);
    }
}

@keyframes scaleInUp {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(20px) rotate(-2deg);
    }
    60% {
        opacity: 1;
        transform: scale(1.03) translateY(-4px) rotate(1deg);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0) rotate(0);
    }
}

@keyframes spring {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.8) rotate(-2deg);
    }
    30% {
        transform: translateY(-12px) scale(1.06) rotate(1deg);
    }
    50% {
        transform: translateY(6px) scale(0.98) rotate(-0.5deg);
    }
    70% {
        transform: translateY(-3px) scale(1.015) rotate(0.3deg);
    }
    85% {
        transform: translateY(1px) scale(0.995) rotate(0);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotate(0);
    }
}

@keyframes bounceSoft {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    35% {
        transform: translateY(-12px) scale(1.03);
    }
    55% {
        transform: translateY(5px) scale(0.99);
    }
    75% {
        transform: translateY(-4px) scale(1.01);
    }
    90% {
        transform: translateY(1px) scale(0.998);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes stagger {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
    }
    60% {
        opacity: 1;
        transform: translateY(-4px) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    33% {
        transform: translateY(-8px) rotate(-2deg);
    }
    66% {
        transform: translateY(-12px) rotate(1.5deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.55;
        transform: scale(1.03);
    }
}

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-30deg) scale(0.7);
    }
    60% {
        opacity: 1;
        transform: rotate(5deg) scale(1.05);
    }
    to {
        opacity: 1;
        transform: rotate(0deg) scale(1);
    }
}

@keyframes flipInY {
    from {
        opacity: 0;
        transform: perspective(400px) rotateY(90deg) scale(0.9);
    }
    60% {
        opacity: 1;
        transform: perspective(400px) rotateY(-8deg) scale(1.03);
    }
    to {
        opacity: 1;
        transform: perspective(400px) rotateY(0) scale(1);
    }
}

@keyframes blurIn {
    from {
        opacity: 0;
        filter: blur(14px);
        transform: scale(1.05);
    }
    60% {
        opacity: 1;
        filter: blur(0);
        transform: scale(0.99);
    }
    to {
        opacity: 1;
        filter: blur(0);
        transform: scale(1);
    }
}

@keyframes slideScaleIn {
    0% {
        opacity: 0;
        transform: translateX(-30px) scale(0.88) rotate(-2deg);
    }
    55% {
        transform: translateX(6px) scale(1.04) rotate(1deg);
    }
    75% {
        transform: translateX(-2px) scale(0.99) rotate(-0.3deg);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1) rotate(0);
    }
}

@keyframes rippleExpand {
    0% {
        transform: scale(0) rotate(0deg);
        opacity: 0.8;
    }
    100% {
        transform: scale(2.2) rotate(90deg);
        opacity: 0;
    }
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow:
            0 0 5px var(--primary),
            0 0 10px var(--primary),
            0 0 15px var(--primary);
        opacity: 1;
        transform: scale(1);
    }
    50% {
        box-shadow:
            0 0 12px var(--primary),
            0 0 24px var(--primary),
            0 0 36px var(--primary),
            0 0 48px var(--primary);
        opacity: 0.85;
        transform: scale(1.04);
    }
}

@keyframes breathe {
    0%, 100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
    50% {
        transform: scale(1.06) rotate(1.5deg);
        opacity: 0.85;
    }
}

.animate-fade-in {
    animation: fadeIn var(--anim-duration-normal) var(--ease-out-cubic);
    will-change: opacity;
}

.animate-fade-in-up {
    animation: fadeInUp 0.7s var(--ease-out-quart);
    will-change: opacity, transform;
}

.animate-fade-in-down {
    animation: fadeInDown 0.7s var(--ease-out-quart);
    will-change: opacity, transform;
}

.animate-slide-up {
    animation: slideUp var(--anim-duration-normal) var(--ease-out-quart);
    will-change: opacity, transform;
}

.animate-scale-in {
    animation: scaleIn var(--anim-duration-normal) var(--ease-out-back);
    will-change: opacity, transform;
}

.animate-scale-in-up {
    animation: scaleInUp 0.7s var(--ease-out-back);
    will-change: opacity, transform;
}

.animate-spring {
    animation: spring 1s var(--ease-out-back);
    will-change: opacity, transform;
}

.animate-bounce-soft {
    animation: bounceSoft 0.8s var(--ease-out-quart);
    will-change: opacity, transform;
}

.animate-stagger {
    animation: stagger 0.6s var(--ease-out-quart) forwards;
    will-change: opacity, transform;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
    will-change: transform;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
    will-change: opacity;
}

.animate-rotate-in {
    animation: rotateIn var(--anim-duration-normal) var(--ease-out-back);
    will-change: opacity, transform;
}

.animate-flip-in-y {
    animation: flipInY var(--anim-duration-normal) var(--ease-out-quart);
    will-change: opacity, transform;
}

.animate-blur-in {
    animation: blurIn var(--anim-duration-slow) cubic-bezier(0.23, 1, 0.32, 1);
    will-change: opacity, filter;
}

.animate-slide-scale-in {
    animation: slideScaleIn 0.6s var(--ease-out-back);
    will-change: opacity, transform;
}

.duration-300 {
    animation-duration: 300ms;
}

.duration-500 {
    animation-duration: 500ms;
}

.duration-700 {
    animation-duration: 700ms;
}

.duration-1000 {
    animation-duration: 1000ms;
}

.delay-100 {
    animation-delay: 100ms;
}

.delay-200 {
    animation-delay: 200ms;
}

.delay-300 {
    animation-delay: 300ms;
}

.delay-400 {
    animation-delay: 400ms;
}

.delay-500 {
    animation-delay: 500ms;
}

.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: all 0.3s var(--ease-out-back);
    position: relative;
    overflow: hidden;
    will-change: transform, box-shadow;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 30px rgba(var(--primary-rgb), 0.45);
}

.btn-primary:active {
    transform: translateY(-2px) scale(0.99);
    box-shadow: 0 6px 20px rgba(var(--primary-rgb), 0.35);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: #ffffff;
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 30px rgba(var(--primary-rgb), 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.05);
    transform: translateY(-2px);
}

.card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.05), transparent);
    border-bottom: 1px solid var(--border-color);
    padding: 18px 24px;
    font-weight: 600;
    font-size: 16px;
    color: var(--text-color);
}

.card-body {
    padding: 24px;
}

.card-footer {
    background: var(--card-bg-light);
    border-top: 1px solid var(--border-color);
    padding: 16px 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-color);
    font-size: 14px;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    height: 48px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 0 16px;
    font-size: 15px;
    transition: var(--transition);
    background: var(--card-bg-light);
    color: var(--text-color);
    font-family: inherit;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(var(--primary-rgb), 0.15);
    background: #ffffff;
    outline: none;
}

.form-input:hover {
    border-color: rgba(var(--primary-rgb), 0.5);
}

.form-input::placeholder {
    color: var(--dark-gray);
}

.alert {
    border-radius: 12px;
    border: none;
    padding: 14px 16px;
    margin-bottom: 24px;
    animation: fadeIn 0.3s var(--ease-out-cubic);
}

.alert-success {
    background: rgba(39, 174, 96, 0.1);
    color: #27ae60;
}

.alert-danger {
    background: rgba(var(--accent-rgb), 0.15);
    color: var(--accent-dark);
}

.alert-info {
    background: rgba(var(--primary-rgb), 0.1);
    color: var(--primary);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

@media screen and (max-width: 768px) {
    .container {
        padding: 0 12px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .card-body {
        padding: 16px;
    }
}