:root {
    --primary-bg: #f5f5f5; /* fundo principal neutro */
    --secondary-bg: rgba(245, 245, 245, 0.85); /* fundo secundário translúcido */
    --card-bg: rgba(255, 255, 255, 0.9); /* fundo dos cards */
    --accent-bg: rgba(200, 200, 200, 0.3); /* fundo de destaque leve */
    --primary-text: #363636; /* texto principal escuro para contraste */
    --secondary-text: #4b5563; /* texto secundário neutro */
    --accent-text: #6b7280; /* texto de destaque discreto */
    --border-color: rgba(171, 171, 171, 0.5); /* bordas suaves */
    --shadow-color: rgba(0, 0, 0, 0.1); /* sombra leve */
    --glass-bg: rgba(255, 255, 255, 0.3); /* efeito glass suave */
    --day-info-color: #555;

    --gray: #4b4b4b;
    --blue: #4c7bc1;
    --green: #00be29;
    --yellow: #f59e0b;
    --red: #ef4444;
    --orange: #f97316;
    --purple: #b8b8b8;
    --roxin: #00be29;

    --glass-bg: rgba(255, 255, 255, 0.2);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(255, 255, 255, 0.1);

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;

    /* Gradiente do título no tema claro */
    --title-gradient-start: #1f2937; /* escuro */
    --title-gradient-end: #6b7280;   /* mais claro */
}

[data-theme="dark"] {
    --primary-bg: #1e1e1e; /* fundo principal escuro neutro */
    --secondary-bg: rgba(30, 30, 30, 0.85); /* fundo secundário translúcido */
    --card-bg: rgba(45, 45, 45, 0.9); /* fundo dos cards */
    --accent-bg: rgba(120, 120, 120, 0.2); /* fundo de destaque neutro */
    --primary-text: #f5f5f5; /* texto principal claro */
    --secondary-text: #a3a3a3; /* texto secundário neutro */
    --accent-text: #d1d1d1; /* texto de destaque suave */
    --border-color: rgba(90, 90, 90, 0.5); /* bordas discretas */
    --shadow-color: rgba(0, 0, 0, 0.4); /* sombra mais presente */
    --glass-bg: rgba(45, 45, 45, 0.3); /* efeito glass escuro */
    --glass-border: rgba(100, 100, 100, 0.3); /* borda glass neutra */
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4); /* sombra glass escura */
    --day-info-color: #f0f0f0;

    /* Gradiente do título no tema escuro */
    --title-gradient-start: #f5f5f5; /* claro */
    --title-gradient-end: #d1d1d1;   /* suave */
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    color: var(--primary-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background var(--transition-normal), color var(--transition-normal);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-normal);
}

.loading-animation {
    position: relative;
    width: 120px;
    height: 120px;
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 2px solid var(--gray);
    border-radius: 50%;
    animation: pulse 2s ease-out infinite;
}

.pulse-ring:nth-child(2) {
    animation-delay: 0.7s;
}

.pulse-ring:nth-child(3) {
    animation-delay: 1.4s;
}

@keyframes pulse {
    0% { width: 40px; height: 40px; opacity: 1; }
    100% { width: 120px; height: 120px; opacity: 0; }
}

/* Login Screen */
.login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: var(--space-md);
}

.login-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--glass-shadow);
    animation: slideUp 0.8s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.login-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, var(--title-gradient-start) 0%, var(--title-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-subtitle {
    color: var(--secondary-text);
    text-align: center;
    margin-bottom: var(--space-xl);
    font-size: 0.95rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* Inputs e Botões */
.input-group {
    position: relative;
}

.input-group input {
    width: 100%;
    padding: var(--space-lg);
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--primary-text);
    transition: all var(--transition-normal);
}

.input-group input:focus {
    outline: none;
    border-color: var(--gray);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.login-btn {
    position: relative;
    width: 100%;
    padding: var(--space-lg);
    background: linear-gradient(135deg, var(--gray) 0%, var(--purple) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

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

.btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.login-btn.loading .btn-loading { opacity: 1; }
.login-btn.loading span { opacity: 0; }

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Demo Accounts */
.demo-accounts {
    margin-top: var(--space-xl);
    text-align: center;
}

.demo-accounts p { color: var(--secondary-text); font-size: 0.9rem; margin-bottom: var(--space-md); }

.demo-buttons { display: flex; gap: var(--space-md); }

.demo-btn {
    flex: 1;
    padding: var(--space-md);
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--secondary-text);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.demo-btn:hover {
    background: var(--accent-bg);
    color: var(--accent-text);
    transform: translateY(-1px);
}

/* Main App */
.main-app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

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

/* Header */
.app-header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--title-gradient-start) 0%, var(--title-gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    background: var(--accent-bg);
    transform: translateY(-2px);
}

.theme-icon {
    width: 20px;
    height: 20px;
    stroke: var(--primary-text);
    fill: none;
    stroke-width: 2;
    transition: all var(--transition-normal);
    position: absolute;
}

.theme-icon.sun {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-icon.moon {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .theme-icon.sun {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .theme-icon.moon {
    opacity: 1;
    transform: rotate(0deg);
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.user-menu-btn:hover {
    background: var(--accent-bg);
    transform: translateY(-1px);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gray) 0%, var(--purple) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.8rem;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--accent-bg);
}

.dropdown-item svg {
    width: 16px;
    height: 16px;
    stroke: var(--secondary-text);
    fill: none;
    stroke-width: 2;
}

.app-nav {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    color: var(--secondary-text);
    font-size: 0.95rem;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(135deg, var(--gray) 0%, var(--purple) 100%);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.nav-btn:hover {
    background: var(--accent-bg);
    color: var(--accent-text);
}

.nav-btn.active {
    background: var(--accent-bg);
    color: var(--accent-text);
}

.nav-btn.active::before {
    transform: translateX(0);
}

.nav-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.app-main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-md);
    width: 100%;
}

.tab-content {
    display: none;
    animation: slideInUp 0.5s ease-out;
}

.tab-content.active {
    display: block;
}

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

@media (max-width: 768px) {
    .header-content {
        padding: 0 var(--space-sm);
        gap: var(--space-sm);
    }
    
    .app-title {
        font-size: 1.25rem;
    }
    
    .header-actions {
        gap: var(--space-sm);
    }
    
    .nav-content {
        padding: 0 var(--space-sm);
        gap: 0;
    }
    
    .nav-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.85rem;
        flex: 1;
        justify-content: center;
    }
    
    .nav-btn span {
        display: none;
    }
    
    .app-main {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .login-container {
        padding: var(--space-sm);
    }
    
    .login-card {
        padding: var(--space-xl);
    }
}

@media (max-width: 480px) {
    .nav-btn {
        padding: var(--space-md);
    }
    
    .nav-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .demo-buttons {
        flex-direction: column;
    }
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.hidden { display: none !important; }
.visible { display: block !important; }

.fade-in {
    animation: fadeIn var(--transition-normal) ease-out;
}

.slide-up {
    animation: slideUp var(--transition-normal) ease-out;
}