/* =============================================
   ENGLISH STUDY MANAGER — DESIGN SYSTEM
   Inspirado em UI minimalista moderna
   ============================================= */

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

/* --- Variáveis Globais --- */
:root {
    /* Cores principais */
    --color-primary:        #49cbeb;
    --color-primary-dark:   #2db5d8;
    --color-primary-light:  #e0f7fc;
    --color-accent:         #3de8c2;
    --color-accent-dark:    #28c9a5;

    /* Superfícies */
    --color-bg:             #f4f5f6;
    --color-surface:        #ffffff;
    --color-surface-2:      #f8f9fa;
    --color-card-dark:      #1a1a2e;

    /* Textos */
    --color-text:           #1a1a2e;
    --color-text-secondary: #4a4a6a;
    --color-text-muted:     #9a9ab0;

    /* Status */
    --color-success:        #3de8c2;
    --color-warning:        #ffd166;
    --color-danger:         #ef476f;
    --color-info:           #49cbeb;

    /* Bordas */
    --border-radius-sm:     10px;
    --border-radius-md:     16px;
    --border-radius-lg:     24px;
    --border-radius-xl:     32px;
    --border-radius-pill:   50px;

    /* Sombras */
    --shadow-sm:    0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md:    0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg:    0 8px 40px rgba(0, 0, 0, 0.12);
    --shadow-card:  0 4px 20px rgba(73, 203, 235, 0.10);

    /* Tipografia */
    --font-family:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;

    /* Espaçamentos extras */
    --spacing-card: 1.5rem;
    --transition:   all 0.2s ease;
}

/* --- Override Bootstrap Variables --- */
body {
    font-family: var(--font-family) !important;
    background-color: var(--color-bg) !important;
    color: var(--color-text) !important;
    -webkit-font-smoothing: antialiased;
}

/* --- Navbar --- */
.navbar {
    background-color: var(--color-surface) !important;
    box-shadow: var(--shadow-sm) !important;
    padding: 0.875rem 0;
}
.navbar-brand {
    color: var(--color-text) !important;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.3px;
}
.navbar-nav .nav-link {
    color: var(--color-text-secondary) !important;
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: 0.5rem 0.875rem !important;
    border-radius: var(--border-radius-pill);
    transition: var(--transition);
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--color-primary-dark) !important;
    background-color: var(--color-primary-light) !important;
}
.navbar-toggler {
    border: none !important;
    box-shadow: none !important;
}
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,26,46,0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

/* --- Cards --- */
.card {
    border: none !important;
    border-radius: var(--border-radius-lg) !important;
    box-shadow: var(--shadow-md) !important;
    background-color: var(--color-surface) !important;
    transition: var(--transition);
}
.card:hover {
    box-shadow: var(--shadow-lg) !important;
    transform: translateY(-2px);
}
.card-header {
    border-bottom: 1px solid #f0f0f5 !important;
    background-color: var(--color-surface) !important;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0 !important;
    padding: 1.25rem var(--spacing-card) !important;
}
.card-body {
    padding: var(--spacing-card) !important;
}

/* Card escuro (destaque) */
.card-dark {
    background-color: var(--color-card-dark) !important;
    color: #ffffff !important;
}
.card-dark .card-title,
.card-dark h6,
.card-dark h2 {
    color: #ffffff !important;
}

/* Card primário */
.card.bg-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)) !important;
}
.card.bg-success {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark)) !important;
}
.card.bg-info {
    background: linear-gradient(135deg, #49cbeb, #2db5d8) !important;
}
.card.bg-warning {
    background: linear-gradient(135deg, #ffd166, #ffb830) !important;
}
.card.bg-dark {
    background: linear-gradient(135deg, #2d2d4e, #1a1a2e) !important;
}

/* --- Botões --- */
.btn {
    border-radius: var(--border-radius-pill) !important;
    font-weight: 600 !important;
    font-size: var(--font-size-sm) !important;
    padding: 0.5rem 1.25rem !important;
    transition: var(--transition) !important;
    border: none !important;
    box-shadow: none !important;
}
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)) !important;
    color: #fff !important;
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), #1a9ec0) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(73, 203, 235, 0.35) !important;
}
.btn-outline-secondary {
    border: 1.5px solid #e0e0ef !important;
    color: var(--color-text-secondary) !important;
    background: var(--color-surface) !important;
}
.btn-outline-secondary:hover {
    background: var(--color-bg) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-primary-dark) !important;
}
.btn-danger {
    background: linear-gradient(135deg, #ef476f, #d63058) !important;
    color: #fff !important;
}
.btn-success {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark)) !important;
    color: #fff !important;
}
.btn-lg {
    padding: 0.75rem 2rem !important;
    font-size: var(--font-size-md) !important;
}
.btn-sm {
    padding: 0.35rem 0.875rem !important;
    font-size: var(--font-size-xs) !important;
}

/* --- Badges --- */
.badge {
    border-radius: var(--border-radius-pill) !important;
    font-weight: 600 !important;
    font-size: 0.7rem !important;
    padding: 0.35em 0.75em !important;
    letter-spacing: 0.2px;
}
.badge.bg-success  { background-color: #e6fdf7 !important; color: #1a9e7e !important; }
.badge.bg-warning  { background-color: #fff8e1 !important; color: #b08000 !important; }
.badge.bg-danger   { background-color: #fef0f3 !important; color: #c0294a !important; }
.badge.bg-primary  { background-color: var(--color-primary-light) !important; color: var(--color-primary-dark) !important; }
.badge.bg-info     { background-color: #e0f7fc !important; color: #0a7fa0 !important; }
.badge.bg-secondary{ background-color: #f0f0f8 !important; color: #5a5a7a !important; }
.badge.bg-dark     { background-color: #e8e8f0 !important; color: #1a1a2e !important; }

/* --- Tabelas --- */
.table {
    font-size: var(--font-size-sm) !important;
}
.table thead th {
    font-weight: 600 !important;
    color: var(--color-text-muted) !important;
    font-size: var(--font-size-xs) !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid #f0f0f5 !important;
    padding: 0.875rem 1rem !important;
}
.table tbody td {
    padding: 0.875rem 1rem !important;
    color: var(--color-text) !important;
    border-bottom: 1px solid #f8f8fc !important;
    vertical-align: middle;
}
.table-hover tbody tr:hover {
    background-color: #fafafe !important;
}
.table-light {
    background-color: #fafafe !important;
}

/* --- Formulários --- */
.form-control,
.form-select {
    border-radius: var(--border-radius-sm) !important;
    border: 1.5px solid #e8e8f0 !important;
    font-size: var(--font-size-sm) !important;
    padding: 0.625rem 1rem !important;
    color: var(--color-text) !important;
    background-color: var(--color-surface) !important;
    transition: var(--transition) !important;
}
.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary) !important;
    box-shadow: 0 0 0 3px rgba(73, 203, 235, 0.15) !important;
}
.form-select {
    padding-right: 2.25rem !important;
    background-position: right 0.75rem center !important;
    background-size: 16px 12px !important;
    appearance: auto !important;
    -webkit-appearance: menulist !important;
    -moz-appearance: menulist !important;
}
.form-select-sm {
    padding-right: 2rem !important;
    background-position: right 0.65rem center !important;
}
.form-label {
    font-weight: 600 !important;
    font-size: var(--font-size-sm) !important;
    color: var(--color-text-secondary) !important;
    margin-bottom: 0.375rem !important;
}
.form-check-input:checked {
    background-color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
}

/* --- Progress Bar --- */
.progress {
    border-radius: var(--border-radius-pill) !important;
    background-color: #f0f0f8 !important;
    height: 8px !important;
}
.progress-bar {
    border-radius: var(--border-radius-pill) !important;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent)) !important;
}

/* --- Alerts --- */
.alert {
    border-radius: var(--border-radius-md) !important;
    border: none !important;
    font-size: var(--font-size-sm) !important;
    font-weight: 500 !important;
}

/* --- Títulos de página --- */
.page-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.5px;
    margin-bottom: 0;
}
.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* --- Utilitários extras --- */
.text-primary   { color: var(--color-primary-dark) !important; }
.text-muted     { color: var(--color-text-muted) !important; }
.bg-surface     { background-color: var(--color-surface) !important; }
.bg-app         { background-color: var(--color-bg) !important; }
.rounded-card   { border-radius: var(--border-radius-lg) !important; }
.rounded-pill-custom { border-radius: var(--border-radius-pill) !important; }
.shadow-card    { box-shadow: var(--shadow-md) !important; }
.fw-semibold    { font-weight: 600 !important; }
.fw-extrabold   { font-weight: 800 !important; }