@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --secondary-dark: #db2777;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --dark-secondary: #334155;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --text-color: #0f172a;
    --text-light: #64748b;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Navbar Moderno */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    white-space: nowrap;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-links > div {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.user-greeting {
    color: var(--dark-color);
    font-weight: 600;
    font-size: 0.9375rem;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius);
    white-space: nowrap;
}

/* Botões Modernos com Glassmorphism */
.btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
    letter-spacing: 0.025em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    color: var(--white);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--secondary-dark), var(--secondary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-block {
    width: 100%;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: var(--white);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Main Content */
.main-content {
    padding: 3rem 0;
    min-height: calc(100vh - 100px);
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: 0.75rem;
    color: var(--white);
    font-weight: 800;
    text-align: center;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    letter-spacing: -1px;
}

.page-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
    text-align: center;
    font-weight: 400;
}

/* Products Grid Moderno */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-xl);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: transform 0.4s;
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.product-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.product-card .price {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 1.5rem 0;
    letter-spacing: -1px;
}

.product-card .price::before {
    content: 'R$';
    font-size: 1.5rem;
    margin-right: 0.25rem;
    opacity: 0.7;
}

.product-card .description {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1rem;
    line-height: 1.7;
}

/* Auth Pages Modernas */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    top: -250px;
    right: -250px;
    animation: float 20s infinite ease-in-out;
}

.auth-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    bottom: -200px;
    left: -200px;
    animation: float 15s infinite ease-in-out reverse;
}

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

.auth-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 3rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 450px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    position: relative;
    z-index: 1;
    animation: slideUp 0.5s ease-out;
}

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

.auth-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-color);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 600;
    font-size: 0.9375rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.3s;
    background: var(--white);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-light);
    font-size: 0.9375rem;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.auth-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius);
    display: none;
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
}

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

.message.success {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
    border: 2px solid #10b981;
    display: block;
}

.message.error {
    background: linear-gradient(135deg, #fee2e2, #fecaca);
    color: #991b1b;
    border: 2px solid #ef4444;
    display: block;
}

/* Modal Moderno */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    animation: fadeIn 0.3s;
}

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

.modal-content {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    margin: 5% auto;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: slideDown 0.4s ease-out;
}

.modal-large {
    max-width: 900px;
}

.close {
    color: var(--text-light);
    float: right;
    font-size: 32px;
    font-weight: 300;
    cursor: pointer;
    transition: all 0.3s;
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close:hover {
    color: var(--dark-color);
    background: var(--light-color);
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: 2rem;
    color: var(--dark-color);
    font-weight: 700;
    font-size: 1.75rem;
    letter-spacing: -0.5px;
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--white);
    font-size: 1.125rem;
}

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

/* Responsividade */
@media (max-width: 768px) {
    .navbar {
        padding: 0.875rem 0;
    }

    .navbar .container {
        flex-direction: row;
        gap: 1rem;
    }

    .nav-brand {
        font-size: 1.25rem;
    }

    .nav-links {
        gap: 0.5rem;
    }

    .nav-links > div {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .nav-links .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }

    .user-greeting {
        width: 100%;
        text-align: center;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 10px;
    }

    .product-card {
        padding: 2rem;
    }

    .auth-card {
        padding: 2rem 1.5rem;
        margin: 1rem;
    }

    .auth-container {
        padding: 1rem;
    }

    .modal-content {
        padding: 1.5rem;
        margin: 10% auto;
        width: 95%;
        max-height: 85vh;
    }

    .main-content {
        padding: 2rem 0;
    }

    .page-title {
        font-size: 2rem;
        padding: 0 1rem;
    }

    .page-subtitle {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-wrap: wrap;
    }

    .nav-brand {
        font-size: 1.125rem;
    }

    .nav-links {
        width: 100%;
        margin-top: 0.5rem;
    }

    .nav-links > div {
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
    }

    .nav-links .btn {
        width: 100%;
        padding: 0.625rem 1rem;
        font-size: 0.8125rem;
    }

    .user-greeting {
        width: 100%;
        text-align: center;
        margin-bottom: 0.5rem;
    }

    .page-title {
        font-size: 1.75rem;
        line-height: 1.2;
    }

    .page-subtitle {
        font-size: 0.9375rem;
        margin-bottom: 2rem;
    }

    .product-card {
        padding: 1.5rem;
    }

    .product-card h3 {
        font-size: 1.5rem;
    }

    .product-card .price {
        font-size: 2rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .auth-card h1 {
        font-size: 1.75rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 0.875rem;
    }
}

/* Scrollbar Customizado */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
}