:root {
    /* Canada Theme Colors */
    --canada-red: #FF0000;
    --canada-dark-red: #CC0000;
    --canada-light-red: #FF3333;
    --canada-white: #FFFFFF;
    --canada-snow: #FAFAFA;
    --canada-ice: #F0F4F8;
    
    /* Accent Colors */
    --maple-gold: #FFB800;
    --forest-green: #2E7D32;
    --lake-blue: #1976D2;
    --mountain-gray: #546E7A;
    
    /* UI Colors */
    --text-primary: #1A1A1A;
    --text-secondary: #5F6368;
    --border-light: #E0E0E0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.16);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.20);
}

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

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--canada-snow) 0%, var(--canada-ice) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    position: relative;
}

/* Canada Pattern Background */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 0, 0, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255, 0, 0, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 0, 0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Maple Leaf Decorative Elements */
.maple-decoration {
    position: absolute;
    font-size: 120px;
    color: rgba(255, 0, 0, 0.05);
    animation: floatMaple 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

.maple-1 {
    top: 10%;
    left: 5%;
}

.maple-2 {
    top: 70%;
    right: 10%;
}

@keyframes floatMaple {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

/* Modern Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: "🍁";
    position: absolute;
    font-size: 500px;
    opacity: 0.03;
    animation: rotateMaple 60s linear infinite;
    z-index: 0;
}

@keyframes rotateMaple {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.login-box {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 50px;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    width: 450px;
    z-index: 10;
    border-top: 5px solid var(--canada-red);
    position: relative;
    animation: slideUp 0.6s ease-out;
}

.login-box::before {
    content: "🍁";
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 60px;
    background: white;
    border-radius: 50%;
    padding: 10px;
    box-shadow: var(--shadow-md);
}

.login-box h1 {
    color: var(--canada-red);
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.8em;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.login-box h2 {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 35px;
    font-size: 1.1em;
    font-weight: 400;
}

.login-box h2 span {
    color: var(--canada-red);
    font-weight: 600;
}

/* Modern Input Fields */
.form-group {
    margin-bottom: 25px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.login-box input, .login-box select {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-light);
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: var(--canada-snow);
}

.login-box input:focus, .login-box select:focus {
    outline: none;
    border-color: var(--canada-red);
    background: white;
    box-shadow: 0 0 0 4px rgba(255, 0, 0, 0.1);
    transform: translateY(-2px);
}

.login-box button {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.login-box button::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;
}

.login-box button:hover::before {
    width: 300px;
    height: 300px;
}

.login-box button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 0, 0, 0.3);
}

/* Modern Navbar */
.navbar, .navbar-modern {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    padding: 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
    animation: slideDown 0.5s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.8em;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.nav-brand i {
    font-size: 1.5em;
    animation: pulseMaple 2s ease-in-out infinite;
}

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

.nav-menu {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-menu a, .nav-btn {
    color: white;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.nav-menu a:hover, .nav-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Modern Container */
.container, .main-container {
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* Modern Page Header */
.page-header {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.page-title {
    font-size: 3em;
    color: var(--canada-red);
    margin-bottom: 15px;
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    display: inline-flex;
    align-items: center;
    gap: 20px;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.2em;
    margin-top: 10px;
}

/* Modern Cards */
.card {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    animation: fadeInUp 0.6s ease;
}

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

.card-header {
    padding: 25px;
    background: linear-gradient(135deg, var(--canada-snow), white);
    border-bottom: 2px solid var(--canada-red);
}

.card-title {
    font-size: 1.5em;
    color: var(--canada-red);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
}

.card-body {
    padding: 30px;
}

/* Modern Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.stat-card {
    background: white;
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    border-top: 4px solid var(--canada-red);
}

.stat-card::before {
    content: "🍁";
    position: absolute;
    top: -20px;
    right: -20px;
    font-size: 100px;
    opacity: 0.05;
    transform: rotate(15deg);
}

.stat-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.stat-card h3 {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 1.1em;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-number {
    font-size: 3em;
    color: var(--canada-red);
    font-weight: 800;
    text-shadow: 2px 2px 4px rgba(255, 0, 0, 0.1);
}

/* Modern Tables */
.modern-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.modern-table thead {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
}

.modern-table th {
    padding: 18px;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.9em;
}

.modern-table td {
    padding: 16px 18px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.modern-table tbody tr {
    transition: all 0.3s ease;
}

.modern-table tbody tr:hover {
    background: var(--canada-snow);
    transform: scale(1.01);
}

/* Modern Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-success {
    background: linear-gradient(135deg, var(--forest-green), #1B5E20);
    color: white;
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-success:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* TEF/TCF Specific Styles */
.exam-badge {
    display: inline-block;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--maple-gold), #FF9800);
    color: white;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-sm);
}

.level-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: white;
    border: 2px solid var(--canada-red);
    border-radius: 10px;
    color: var(--canada-red);
    font-weight: 600;
}

/* Animations */
@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

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

/* Error Highlighting for TEF/TCF */
.error-tef {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
    cursor: help;
    position: relative;
}

.error-tcf {
    background: linear-gradient(135deg, var(--lake-blue), #1565C0);
    color: white;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
    cursor: help;
}

/* Responsive Design */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-container {
        flex-direction: column;
        gap: 20px;
    }
    
    .page-title {
        font-size: 2em;
    }
    
    .card {
        margin-bottom: 20px;
    }
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 0, 0, 0.3);
    border-radius: 50%;
    border-top-color: var(--canada-red);
    animation: spin 1s ease-in-out infinite;
}

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

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: white;
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    display: none;
    align-items: center;
    gap: 15px;
    animation: slideInRight 0.3s ease;
    border-left: 5px solid var(--canada-red);
    max-width: 400px;
    z-index: 2000;
}

.toast.show {
    display: flex;
}

.toast.success {
    border-left-color: var(--forest-green);
}

.toast.error {
    border-left-color: var(--canada-red);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Canadian Theme Footer */
.footer {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    text-align: center;
    padding: 30px;
    margin-top: 60px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-maple {
    font-size: 40px;
    margin-bottom: 15px;
}

.footer-text {
    font-size: 1.1em;
    margin-bottom: 10px;
}

.footer-subtitle {
    font-size: 0.9em;
    opacity: 0.9;
}
.suggestion-footer {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 5px;
    border-left: 4px solid var(--canada-red);
}

/* Button Styles */
.btn-improvement {
    background: linear-gradient(135deg, #8A2BE2 0%, #9370DB 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    margin: 5px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(138, 43, 226, 0.3);
}

.btn-improvement:hover {
    background: linear-gradient(135deg, #7B68EE 0%, #8A2BE2 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(138, 43, 226, 0.4);
}

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

.error-msg {
    color: var(--canada-red);
    text-align: center;
    margin-top: 10px;
}

/* Index Page Specific Styles */
.auth-options {
    margin-top: 25px;
    text-align: center;
}

.register-text {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.btn-register {
    background: transparent;
    border: 2px solid var(--canada-red);
    color: var(--canada-red);
    padding: 12px 24px;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-register:hover {
    background: var(--canada-red);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#errorMsg {
    margin-top: 15px;
    color: var(--canada-red);
    text-align: center;
    font-weight: 500;
}

.exam-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--border-light);
    text-align: center;
}

.exam-badge {
    display: inline-block;
    margin: 5px;
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.register-modal {
    max-width: 500px;
    animation: modalSlideIn 0.3s ease-out;
}

.register-title {
    color: var(--canada-red);
    margin-bottom: 30px;
    text-align: center;
    font-size: 1.4rem;
}

.btn-submit {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    width: 100%;
    margin-bottom: 10px;
}

.btn-submit:hover {
    background: linear-gradient(135deg, var(--canada-dark-red), #990000);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-cancel {
    background: transparent;
    border: 2px solid var(--text-secondary);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    width: 100%;
}

.btn-cancel:hover {
    background: var(--text-secondary);
    color: white;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Balão de Sugestões para Palavras com Erro */
.error-word {
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    display: inline-block;
}

.error-word:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.suggestion-balloon {
    position: absolute;
    background: var(--canada-white);
    border: 2px solid var(--canada-red);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    padding: 16px;
    min-width: 280px;
    max-width: 400px;
    z-index: 10000;
    display: none;
    font-size: 14px;
    line-height: 1.4;
    font-weight: normal;
    animation: balloonSlideIn 0.3s ease-out;
    pointer-events: auto;
}

.suggestion-balloon::before {
    content: '';
    position: absolute;
    border: 10px solid transparent;
}

.suggestion-balloon::after {
    content: '';
    position: absolute;
    border: 8px solid transparent;
}

/* Seta para balão acima da palavra */
.balloon-above::before {
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-top-color: var(--canada-red);
}

.balloon-above::after {
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-top-color: var(--canada-white);
}

/* Seta para balão abaixo da palavra */
.balloon-below::before {
    bottom: 100%;
    left: 30px;
    border-bottom-color: var(--canada-red);
}

.balloon-below::after {
    bottom: 100%;
    left: 32px;
    border-bottom-color: var(--canada-white);
}

/* Seta para balão à direita da palavra */
.balloon-right::before {
    top: 20px;
    right: 100%;
    border-right-color: var(--canada-red);
}

.balloon-right::after {
    top: 22px;
    right: 100%;
    border-right-color: var(--canada-white);
}

/* Seta para balão à esquerda da palavra */
.balloon-left::before {
    top: 20px;
    left: 100%;
    border-left-color: var(--canada-red);
}

.balloon-left::after {
    top: 22px;
    left: 100%;
    border-left-color: var(--canada-white);
}

.balloon-header {
    background: linear-gradient(135deg, var(--canada-red), var(--canada-dark-red));
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    margin: -16px -16px 12px -16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.error-type {
    display: inline-block;
    background: rgba(255, 0, 0, 0.1);
    color: var(--canada-red);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.correction-suggestion {
    background: rgba(46, 125, 50, 0.1);
    border-left: 3px solid var(--forest-green);
    padding: 8px 12px;
    margin: 8px 0;
    border-radius: 4px;
}

.correction-text {
    font-weight: 600;
    color: var(--forest-green);
    margin-bottom: 4px;
}

.explanation-text {
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 8px;
}

.close-balloon {
    position: absolute;
    top: 4px;
    right: 8px;
    background: none;
    border: none;
    color: white;
    font-size: 16px;
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.close-balloon:hover {
    background: rgba(255, 255, 255, 0.2);
}

@keyframes balloonSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Overlay para fechar balão ao clicar fora */
.balloon-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    display: none;
}