css DRY

static/css/custom.css

@@ -1,23 +1,120 @@
 /* Estilos personalizados para el Balotario */
 
 :root {
+    /* Base colors */
     --primary-color: #2c3e50;
     --secondary-color: #3498db;
     --success-color: #27ae60;
     --danger-color: #e74c3c;
-    --warning-color: #f39c1
+    --warning-color: #f39c12;
--light-bg: #ecf0f1;
+    --light-bg: #ecf0f1;
-    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+
-    --gradient-success: linear-gradient(45deg, #27ae60, #58d68d);
+    /* Light theme colors */
-    --gradient-danger: linear-gradient(45deg, #e74c3c, #ec7063);
+    --light-text: #333333;
-    --gradient-warning: linear-gradient(45deg, #f39c12, #f7dc6f);
+    --light-bg-primary: #ffffff;
+    --light-bg-secondary: #f8f9fa;
+    --light-border: #e9ecef;
+
+    /* Dark theme colors */
+    --dark-bg-primary: #2c3e50;
+    --dark-bg-secondary: #34495e;
+    --dark-bg-tertiary: #4a5f7a;
+    --dark-bg-hover: #3d566e;
+    --dark-bg-secondary-hover: #5a6f8a;
+    --dark-text-primary: #ecf0f1;
+    --dark-text-secondary: #e0e0e0;
+    --dark-text-muted: #bbb;
+    --dark-border: #5a6c7d;
+
+    /* Extended color palette */
+    --white: #ffffff;
+    --success-light: #58d68d;
+    --success-border: #2ecc71;
+    --success-dark: #1e7e34;
+    --success-text: #0d4016;
+    --danger-light: #ec7063;
+    --danger-border: #c82333;
+    --danger-text: #721c24;
+    --warning-light: #f7dc6f;
+    --info-color: #17a2b8;
+    --purple: #8e44ad;
+    --purple-light: #a569bd;
+    --purple-hover: #9b59b6;
+    --purple-border: #bb8fce;
+    --blue-light: #5dade2;
+    --gradient-blue-start: #667eea;
+    --gradient-blue-end: #764ba2;
+    --modal-border: #dee2e6;
+    --dark-body-bg: #1a1a1a;
+
+    /* Question navigator colors */
+    --nav-btn-default: var(--dark-bg-secondary);
+    --nav-btn-default-border: var(--dark-border);
+    --nav-btn-hover: var(--dark-bg-tertiary);
+    --nav-btn-visited: var(--purple);
+    --nav-btn-visited-border: var(--purple-light);
+    --nav-btn-visited-hover: var(--purple-hover);
+    --nav-btn-visited-hover-border: var(--purple-border);
+    --nav-btn-answered: var(--success-color);
+    --nav-btn-answered-border: var(--success-border);
+    --nav-btn-current: var(--secondary-color);
+    --nav-btn-current-border: var(--blue-light);
+
+    /* Shadow colors */
+    --shadow-light: rgba(0, 0, 0, 0.1);
+    --shadow-medium: rgba(0, 0, 0, 0.2);
+    --shadow-medium-intense: rgba(0, 0, 0, 0.15);
+    --shadow-dark: rgba(0, 0, 0, 0.3);
+    --shadow-blue: rgba(52, 152, 219, 0.4);
+    --shadow-blue-intense: rgba(52, 152, 219, 0.5);
+    --shadow-green: rgba(39, 174, 96, 0.4);
+    --shadow-purple: rgba(142, 68, 173, 0.4);
+    --shadow-purple-intense: rgba(155, 89, 182, 0.5);
+
+    /* Background alpha colors - for better DRY */
+    --bg-secondary-alpha-10: rgba(52, 152, 219, 0.1);
+    --bg-secondary-alpha-20: rgba(52, 152, 219, 0.2);
+    --bg-secondary-alpha-25: rgba(52, 152, 219, 0.25);
+    --bg-secondary-alpha-30: rgba(52, 152, 219, 0.3);
+    --bg-secondary-alpha-35: rgba(52, 152, 219, 0.35);
+    --bg-success-alpha-20: rgba(39, 174, 96, 0.2);
+    --bg-success-alpha-25: rgba(39, 174, 96, 0.25);
+    --bg-success-alpha-30: rgba(39, 174, 96, 0.3);
+    --bg-success-alpha-40: rgba(39, 174, 96, 0.4);
+    --bg-danger-alpha-20: rgba(231, 76, 60, 0.2);
+    --bg-danger-alpha-25: rgba(231, 76, 60, 0.25);
+    --bg-danger-alpha-30: rgba(231, 76, 60, 0.3);
+    --bg-danger-alpha-40: rgba(231, 76, 60, 0.4);
+    --bg-white-alpha-95: rgba(255, 255, 255, 0.95);
+    --bg-dark-primary-alpha-95: rgba(44, 62, 80, 0.95);
+    --bg-dark-primary-alpha-98: rgba(44, 62, 80, 0.98);
+    --bg-navbar-dark: rgba(26, 26, 26, 0.95);
+    --bg-white-alpha-10: rgba(255, 255, 255, 0.1);
+    --bg-white-alpha-20: rgba(255, 255, 255, 0.2);
+    --bg-white-alpha-30: rgba(255, 255, 255, 0.3);
+    --bg-white-alpha-50: rgba(255, 255, 255, 0.5);
+    --bg-modal-backdrop: rgba(0, 0, 0, 0.5);
+
+    /* Gradients */
+    --gradient-primary: linear-gradient(135deg, var(--gradient-blue-start) 0%, var(--gradient-blue-end) 100%);
+    --gradient-success: linear-gradient(45deg, var(--success-color), var(--success-light));
+    --gradient-danger: linear-gradient(45deg, var(--danger-color), var(--danger-light));
+    --gradient-warning: linear-gradient(45deg, var(--warning-color), var(--warning-light));
 }
 
 /* Animaciones personalizadas */
 @keyframes pulse {
-    0% { transform: scale(1); }
+    0% {
-    50% { transform: scale(1.05); }
+        transform: scale(1);
-    100% { transform: scale(1); }
+    }
+
+    50% {
+        transform: scale(1.05);
+    }
+
+    100% {
+        transform: scale(1);
+    }
 }
 
 @keyframes slideInUp {
@@ -25,6 +122,7 @@
         opacity: 0;
         transform: translateY(30px);
     }
+
     to {
         opacity: 1;
         transform: translateY(0);
@@ -36,6 +134,7 @@
         opacity: 0;
         transform: scale(0.9);
     }
+
     to {
         opacity: 1;
         transform: scale(1);
@@ -49,7 +148,7 @@
 
 .card-hover:hover {
     transform: translateY(-8px);
-    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
+    box-shadow: 0 20px 40px var(--shadow-medium-intense);
 }
 
 /* Botones con efectos especiales */
@@ -65,7 +164,7 @@
     left: -100%;
     width: 100%;
     height: 100%;
-    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
+    background: linear-gradient(90deg, transparent, var(--bg-white-alpha-30), transparent);
     transition: left 0.5s;
 }
 
@@ -93,11 +192,11 @@
 }
 
 .progress-ring .bg {
-    stroke: rgba(255,255,255,0.2);
+    stroke: var(--bg-white-alpha-20);
 }
 
 .progress-ring .progress {
-    stroke: #fff;
+    stroke: var(--white);
     stroke-dasharray: 283;
     stroke-dashoffset: 283;
     transition: stroke-dashoffset 0.5s ease-in-out;
@@ -105,11 +204,11 @@
 
 /* Efectos de texto */
 .text-glow {
-    text-shadow: 0 0 10px rgba(255,255,255,0.5);
+    text-shadow: 0 0 10px var(--bg-white-alpha-50);
 }
 
 .text-gradient {
-    background: linear-gradient(45deg, #667eea, #764ba2);
+    background: linear-gradient(45deg, var(--gradient-blue-start), var(--gradient-blue-end));
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     background-clip: text;
@@ -117,12 +216,12 @@
 
 /* Tarjetas de preguntas mejoradas - tema claro por defecto */
 .question-card-enhanced {
-    background: white;
+    background: var(--white);
-    color: #333333;
+    color: var(--light-text);
     border-radius: 20px;
     padding: 2.5rem;
     margin-bottom: 2rem;
-    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
+    box-shadow: 0 15px 35px var(--shadow-light);
     position: relative;
     overflow: hidden;
 }
@@ -139,8 +238,8 @@
 
 /* Opciones de respuesta mejoradas */
 .option-enhanced {
-    background: white;
+    background: var(--white);
-    border: 2px solid #e9ecef;
+    border: 2px solid var(--light-border);
     border-radius: 15px;
     padding: 20px;
     margin-bottom: 15px;
@@ -157,7 +256,7 @@
     left: -100%;
     width: 100%;
     height: 100%;
-    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
+    background: linear-gradient(90deg, transparent, var(--bg-secondary-alpha-10), transparent);
     transition: left 0.3s ease;
     pointer-events: none;
 }
@@ -169,46 +268,46 @@
 .option-enhanced:hover {
     border-color: var(--secondary-color);
     transform: translateX(5px);
-    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.2);
+    box-shadow: 0 8px 25px var(--shadow-blue);
 }
 
 .option-enhanced.selected {
     border-color: var(--secondary-color);
-    background: rgba(52, 152, 219, 0.25);
+    background: var(--bg-secondary-alpha-25);
     transform: translateX(5px);
-    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
+    box-shadow: 0 4px 15px var(--bg-secondary-alpha-30);
 }
 
 .option-enhanced.correct {
     border-color: var(--success-color);
-    background: rgba(39, 174, 96, 0.25);
+    background: var(--bg-success-alpha-25);
     animation: pulse 0.6s ease-in-out;
-    color: #1e5631;
+    color: var(--success-dark);
     font-weight: 600;
 }
 
 .option-enhanced.incorrect {
     border-color: var(--danger-color);
-    background: rgba(231, 76, 60, 0.25);
+    background: var(--bg-danger-alpha-25);
-    color: #721c24;
+    color: var(--danger-text);
     font-weight: 600;
 }
 
 /* Navegador de preguntas mejorado */
 .question-navigator {
-    background: rgba(255,255,255,0.95);
+    background: var(--bg-white-alpha-95);
     backdrop-filter: blur(10px);
     border-radius: 15px;
     padding: 1.5rem;
-    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
+    box-shadow: 0 8px 25px var(--shadow-light);
 }
 
 .nav-question-btn {
     width: 45px;
     height: 45px;
     border-radius: 50%;
-    border: 2px solid #e9ecef;
+    border: 2px solid var(--light-border);
-    background: white;
+    background: var(--white);
     display: flex;
     align-items: center;
     justify-content: center;
@@ -219,7 +318,7 @@
 
 .nav-question-btn:hover {
     transform: scale(1.1);
-    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
+    box-shadow: 0 5px 15px var(--shadow-medium);
 }
 
 .nav-question-btn.answered {
@@ -271,19 +370,24 @@
     left: -50%;
     width: 200%;
     height: 200%;
-    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
+    background: radial-gradient(circle, var(--bg-white-alpha-10) 0%, transparent 70%);
     animation: rotate 20s linear infinite;
 }
 
 @keyframes rotate {
-    0% { transform: rotate(0deg); }
+    0% {
-    100% { transform: rotate(360deg); }
+        transform: rotate(0deg);
+    }
+
+    100% {
+        transform: rotate(360deg);
+    }
 }
 
 .stats-number {
     font-size: 2.5rem;
     font-weight: bold;
-    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
+    text-shadow: 0 2px 4px var(--shadow-dark);
 }
 
 /* Responsive mejoras */
@@ -314,247 +418,247 @@
 [data-theme="light"] .option-enhanced.selected,
 :root:not([data-theme="dark"]) .option-enhanced.selected {
     border-color: var(--secondary-color);
-    background: rgba(52, 152, 219, 0.35);
+    background: var(--bg-secondary-alpha-35);
     transform: translateX(5px);
-    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
+    box-shadow: 0 6px 20px var(--shadow-blue);
     border-width: 3px;
 }
 
 [data-theme="light"] .option-btn.selected,
 :root:not([data-theme="dark"]) .option-btn.selected {
-    background: rgba(52, 152, 219, 0.35) !important;
+    background: var(--bg-secondary-alpha-35) !important;
     border-color: var(--secondary-color) !important;
-    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4) !important;
+    box-shadow: 0 6px 20px var(--shadow-blue) !important;
     border-width: 3px !important;
 }
 
 /* Tema claro - respuestas correctas más intensas */
 [data-theme="light"] .option-enhanced.correct,
 :root:not([data-theme="dark"]) .option-enhanced.correct {
-    border-color: #1e7e34;
+    border-color: var(--success-dark);
-    background: rgba(39, 174, 96, 0.4);
+    background: var(--bg-success-alpha-40);
-    color: #0d4016;
+    color: var(--success-text);
     font-weight: 700;
     border-width: 3px;
-    box-shadow: 0 6px 20px rgba(39, 174, 96, 0.3);
+    box-shadow: 0 6px 20px var(--shadow-green);
 }
 
 [data-theme="light"] .option-btn.correct,
 :root:not([data-theme="dark"]) .option-btn.correct {
-    background: rgba(39, 174, 96, 0.4) !important;
+    background: var(--bg-success-alpha-40) !important;
-    border-color: #1e7e34 !important;
+    border-color: var(--success-dark) !important;
-    color: #0d4016 !important;
+    color: var(--success-text) !important;
     font-weight: 700 !important;
     border-width: 3px !important;
-    box-shadow: 0 6px 20px rgba(39, 174, 96, 0.3) !important;
+    box-shadow: 0 6px 20px var(--shadow-green) !important;
 }
 
 /* Tema claro - respuestas incorrectas más intensas */
 [data-theme="light"] .option-enhanced.incorrect,
 :root:not([data-theme="dark"]) .option-enhanced.incorrect {
-    border-color: #c82333;
+    border-color: var(--danger-border);
-    background: rgba(231, 76, 60, 0.4);
+    background: var(--bg-danger-alpha-40);
-    color: #721c24;
+    color: var(--danger-text);
     font-weight: 700;
     border-width: 3px;
-    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.3);
+    box-shadow: 0 6px 20px var(--bg-danger-alpha-30);
 }
 
 [data-theme="light"] .option-btn.incorrect,
 :root:not([data-theme="dark"]) .option-btn.incorrect {
-    background: rgba(231, 76, 60, 0.4) !important;
+    background: var(--bg-danger-alpha-40) !important;
-    border-color: #c82333 !important;
+    border-color: var(--danger-border) !important;
-    color: #721c24 !important;
+    color: var(--danger-text) !important;
     font-weight: 700 !important;
     border-width: 3px !important;
-    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.3) !important;
+    box-shadow: 0 6px 20px var(--bg-danger-alpha-30) !important;
 }
 
 /* Modal support for light theme - ensuring proper styling */
 [data-theme="light"] .modal-content,
 :root:not([data-theme="dark"]) .modal-content {
-    background: #ffffff !important;
+    background: var(--white) !important;
-    color: #333333 !important;
+    color: var(--light-text) !important;
-    border: 1px solid #dee2e6 !important;
+    border: 1px solid var(--modal-border) !important;
 }
 
 [data-theme="light"] .modal-header,
 :root:not([data-theme="dark"]) .modal-header {
-    border-bottom-color: #dee2e6 !important;
+    border-bottom-color: var(--modal-border) !important;
 }
 
 [data-theme="light"] .modal-footer,
 :root:not([data-theme="dark"]) .modal-footer {
-    border-top-color: #dee2e6 !important;
+    border-top-color: var(--modal-border) !important;
 }
 
 [data-theme="light"] .modal-title,
 :root:not([data-theme="dark"]) .modal-title {
-    color: #333333 !important;
+    color: var(--light-text) !important;
 }
 
 /* Tema claro - question cards */
 [data-theme="light"] .question-card-enhanced,
 :root:not([data-theme="dark"]) .question-card-enhanced {
-    background: white !important;
+    background: var(--white) !important;
-    color: #333333 !important;
+    color: var(--light-text) !important;
-    box-shadow: 0 15px 35px rgba(0,0,0,0.1) !important;
+    box-shadow: 0 15px 35px var(--shadow-light) !important;
 }
 
 [data-theme="light"] .question-card,
 :root:not([data-theme="dark"]) .question-card {
-    background: white !important;
+    background: var(--white) !important;
-    color: #333333 !important;
+    color: var(--light-text) !important;
 }
 
 /* Modo oscuro */
 [data-theme="dark"] {
-    background: #1a1a1a !important;
+    background: var(--dark-body-bg) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] body {
-    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%) !important;
+    background: linear-gradient(135deg, var(--dark-bg-primary) 0%, var(--dark-bg-secondary) 100%) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .container-main {
-    background: rgba(44, 62, 80, 0.95) !important;
+    background: var(--bg-dark-primary-alpha-95) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .card {
-    background: #34495e !important;
+    background: var(--dark-bg-secondary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
-    border-color: #4a5f7a !important;
+    border-color: var(--dark-bg-tertiary) !important;
 }
 
 [data-theme="dark"] .question-card,
 [data-theme="dark"] .question-card-enhanced {
-    background: #34495e !important;
+    background: var(--dark-bg-secondary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .option-btn,
 [data-theme="dark"] .option-enhanced {
-    background: #2c3e50 !important;
+    background: var(--dark-bg-primary) !important;
-    border-color: #4a5f7a !important;
+    border-color: var(--dark-bg-tertiary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .option-btn:hover,
 [data-theme="dark"] .option-enhanced:hover {
-    background: #3d566e !important;
+    background: var(--dark-bg-hover) !important;
     border-color: var(--secondary-color) !important;
 }
 
 [data-theme="dark"] .option-btn.correct,
 [data-theme="dark"] .option-enhanced.correct {
-    background: rgba(39, 174, 96, 0.3) !important;
+    background: var(--bg-success-alpha-30) !important;
-    border-color: #27ae60 !important;
+    border-color: var(--success-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .option-btn.incorrect,
 [data-theme="dark"] .option-enhanced.incorrect {
-    background: rgba(231, 76, 60, 0.3) !important;
+    background: var(--bg-danger-alpha-30) !important;
-    border-color: #e74c3c !important;
+    border-color: var(--danger-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .option-btn.selected,
 [data-theme="dark"] .option-enhanced.selected {
-    background: rgba(52, 152, 219, 0.3) !important;
+    background: var(--bg-secondary-alpha-30) !important;
-    border-color: #3498db !important;
+    border-color: var(--secondary-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .navbar {
-    background: rgba(26, 26, 26, 0.95) !important;
+    background: var(--bg-navbar-dark) !important;
 }
 
 [data-theme="dark"] .form-control,
 [data-theme="dark"] .form-select {
-    background: #2c3e50 !important;
+    background: var(--dark-bg-primary) !important;
-    border-color: #4a5f7a !important;
+    border-color: var(--dark-bg-tertiary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .form-control:focus,
 [data-theme="dark"] .form-select:focus {
-    background: #34495e !important;
+    background: var(--dark-bg-secondary) !important;
     border-color: var(--secondary-color) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
-    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25) !important;
+    box-shadow: 0 0 0 0.2rem var(--bg-secondary-alpha-25) !important;
 }
 
 [data-theme="dark"] .alert-success {
-    background: rgba(39, 174, 96, 0.2) !important;
+    background: var(--bg-success-alpha-20) !important;
     border-color: var(--success-color) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .alert-danger {
-    background: rgba(231, 76, 60, 0.2) !important;
+    background: var(--bg-danger-alpha-20) !important;
     border-color: var(--danger-color) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .badge {
-    color: #fff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .text-muted {
-    color: #bbb !important;
+    color: var(--dark-text-muted) !important;
 }
 
 [data-theme="dark"] .correct-option {
-    background: rgba(39, 174, 96, 0.4) !important;
+    background: var(--bg-success-alpha-40) !important;
-    border-color: #27ae60 !important;
+    border-color: var(--success-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .answer-indicator {
-    color: #27ae60 !important;
+    color: var(--success-color) !important;
 }
 
 [data-theme="dark"] .fa-check-circle {
-    color: #27ae60 !important;
+    color: var(--success-color) !important;
 }
 
 [data-theme="dark"] .text-success {
-    color: #2ecc71 !important;
+    color: var(--success-border) !important;
 }
 
 [data-theme="dark"] .text-danger {
-    color: #e74c3c !important;
+    color: var(--danger-color) !important;
 }
 
 [data-theme="dark"] .text-warning {
-    color: #f39c12 !important;
+    color: var(--warning-color) !important;
 }
 
 [data-theme="dark"] .text-primary {
-    color: #3498db !important;
+    color: var(--secondary-color) !important;
 }
 
 /* Modal support for dark theme */
 [data-theme="dark"] .modal-content {
-    background: #2c3e50 !important;
+    background: var(--dark-bg-primary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
-    border: 1px solid #4a5f7a !important;
+    border: 1px solid var(--dark-bg-tertiary) !important;
 }
 
 [data-theme="dark"] .modal-header {
-    border-bottom-color: #4a5f7a !important;
+    border-bottom-color: var(--dark-bg-tertiary) !important;
 }
 
 [data-theme="dark"] .modal-footer {
-    border-top-color: #4a5f7a !important;
+    border-top-color: var(--dark-bg-tertiary) !important;
 }
 
 [data-theme="dark"] .modal-title {
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .btn-close {
@@ -563,25 +667,25 @@
 
 /* Buttons in dark theme */
 [data-theme="dark"] .btn-secondary {
-    background: #4a5f7a !important;
+    background: var(--dark-bg-tertiary) !important;
-    border-color: #4a5f7a !important;
+    border-color: var(--dark-bg-tertiary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .btn-secondary:hover {
-    background: #5a6f8a !important;
+    background: var(--dark-bg-secondary-hover) !important;
-    border-color: #5a6f8a !important;
+    border-color: var(--dark-bg-secondary-hover) !important;
 }
 
 [data-theme="dark"] .btn-outline-secondary {
-    border-color: #4a5f7a !important;
+    border-color: var(--dark-bg-tertiary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] .btn-outline-secondary:hover {
-    background: #4a5f7a !important;
+    background: var(--dark-bg-tertiary) !important;
-    border-color: #4a5f7a !important;
+    border-color: var(--dark-bg-tertiary) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .btn-outline-primary {
@@ -592,65 +696,65 @@
 [data-theme="dark"] .btn-outline-primary:hover {
     background: var(--secondary-color) !important;
     border-color: var(--secondary-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 /* Progress bars in dark theme */
 [data-theme="dark"] .progress {
-    background: rgba(255, 255, 255, 0.1) !important;
+    background: var(--bg-white-alpha-10) !important;
 }
 
 /* Badges in dark theme */
 [data-theme="dark"] .badge.bg-warning {
     background: var(--warning-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .badge.bg-success {
     background: var(--success-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .badge.bg-primary {
     background: var(--secondary-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 /* Question navigator buttons in dark theme */
-/* Dark theme question navigator buttons - DRY approach */
+/* Dark theme question navigator buttons - DRY approach with CSS variables */
 [data-theme="dark"] .question-nav-btn,
 [data-theme="dark"] .nav-question-btn {
-    background: #34495e !important;
+    background: var(--nav-btn-default) !important;
-    border: 2px solid #5a6c7d !important;
+    border: 2px solid var(--nav-btn-default-border) !important;
-    color: #ecf0f1 !important;
+    color: var(--dark-text-primary) !important;
-    box-shadow: 0 2px 8px rgba(0,0,0,0.3) !important;
+    box-shadow: 0 2px 8px var(--shadow-dark) !important;
     transition: all 0.3s ease !important;
 }
 
 /* Hover state for all buttons */
 [data-theme="dark"] .question-nav-btn:hover,
 [data-theme="dark"] .nav-question-btn:hover {
-    background: #4a5f7a !important;
+    background: var(--nav-btn-hover) !important;
-    border-color: #3498db !important;
+    border-color: var(--secondary-color) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
-    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.4) !important;
+    box-shadow: 0 4px 12px var(--shadow-blue) !important;
     transform: scale(1.05) !important;
 }
 
 /* Visited questions - purple */
 [data-theme="dark"] .question-nav-btn.visited,
 [data-theme="dark"] .nav-question-btn.visited {
-    background: #8e44ad !important;
+    background: var(--nav-btn-visited) !important;
-    border-color: #a569bd !important;
+    border-color: var(--nav-btn-visited-border) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
-    box-shadow: 0 3px 10px rgba(142, 68, 173, 0.4) !important;
+    box-shadow: 0 3px 10px var(--shadow-purple) !important;
 }
 
 [data-theme="dark"] .question-nav-btn.visited:hover,
 [data-theme="dark"] .nav-question-btn.visited:hover {
-    background: #9b59b6 !important;
+    background: var(--nav-btn-visited-hover) !important;
-    border-color: #bb8fce !important;
+    border-color: var(--nav-btn-visited-hover-border) !important;
-    box-shadow: 0 4px 12px rgba(155, 89, 182, 0.5) !important;
+    box-shadow: 0 4px 12px var(--shadow-purple-intense) !important;
 }
 
 /* Answered questions - green (higher priority than visited) */
@@ -658,10 +762,10 @@
 [data-theme="dark"] .nav-question-btn.answered,
 [data-theme="dark"] .question-nav-btn.btn-success,
 [data-theme="dark"] .nav-question-btn.btn-success {
-    background: #27ae60 !important;
+    background: var(--nav-btn-answered) !important;
-    border-color: #2ecc71 !important;
+    border-color: var(--nav-btn-answered-border) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
-    box-shadow: 0 3px 10px rgba(39, 174, 96, 0.4) !important;
+    box-shadow: 0 3px 10px var(--shadow-green) !important;
 }
 
 /* Current question - blue (highest priority) */
@@ -669,10 +773,10 @@
 [data-theme="dark"] .nav-question-btn.current,
 [data-theme="dark"] .question-nav-btn.btn-primary,
 [data-theme="dark"] .nav-question-btn.btn-primary {
-    background: #3498db !important;
+    background: var(--nav-btn-current) !important;
-    border-color: #5dade2 !important;
+    border-color: var(--nav-btn-current-border) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
-    box-shadow: 0 3px 10px rgba(52, 152, 219, 0.5) !important;
+    box-shadow: 0 3px 10px var(--shadow-blue-intense) !important;
     transform: scale(1.1) !important;
     z-index: 10 !important;
 }
@@ -680,7 +784,7 @@
 /* Timer and other exam elements */
 [data-theme="dark"] .timer-display {
     background: var(--gradient-warning) !important;
-    color: #ffffff !important;
+    color: var(--white) !important;
 }
 
 [data-theme="dark"] .timer-display.warning {
@@ -689,15 +793,15 @@
 
 /* Question navigator card */
 [data-theme="dark"] .question-navigator {
-    background: rgba(44, 62, 80, 0.98) !important;
+    background: var(--bg-dark-primary-alpha-98) !important;
-    color: #ecf0f1 !important;
+    color: var(--dark-text-primary) !important;
-    border: 1px solid #5a6c7d !important;
+    border: 1px solid var(--dark-border) !important;
-    box-shadow: 0 4px 15px rgba(0,0,0,0.3) !important;
+    box-shadow: 0 4px 15px var(--shadow-dark) !important;
 }
 
 [data-theme="dark"] .question-navigator .card-title {
-    color: #ecf0f1 !important;
+    color: var(--dark-text-primary) !important;
-    border-bottom: 1px solid #5a6c7d;
+    border-bottom: 1px solid var(--dark-border);
     padding-bottom: 0.5rem;
     margin-bottom: 1rem;
 }
@@ -765,29 +869,29 @@ body.modal-open {
     left: 0 !important;
     width: 100vw !important;
     height: 100vh !important;
-    background-color: rgba(0, 0, 0, 0.5) !important;
+    background-color: var(--bg-modal-backdrop) !important;
 }
 
 /* Custom modal theme support */
 [data-theme="dark"] #confirmDialog {
-    background: #2c3e50 !important;
+    background: var(--dark-bg-primary) !important;
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] #confirmDialog h5 {
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] #confirmDialog p {
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] #confirmDialog #confirm-message {
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 [data-theme="dark"] #confirmModalClose {
-    color: #e0e0e0 !important;
+    color: var(--dark-text-secondary) !important;
 }
 
 /* Modo oscuro automático removido para evitar conflictos */
@@ -803,10 +907,24 @@ body.modal-open {
 }
 
 @keyframes dots {
-    0%, 20% { content: ''; }
+
-    40% { content: '.'; }
+    0%,
-    60% { content: '..'; }
+    20% {
-    80%, 100% { content: '...'; }
+        content: '';
+    }
+
+    40% {
+        content: '.';
+    }
+
+    60% {
+        content: '..';
+    }
+
+    80%,
+    100% {
+        content: '...';
+    }
 }
 
 /* Confetti effect para celebrar */
@@ -824,7 +942,7 @@ body.modal-open {
     position: absolute;
     width: 10px;
     height: 10px;
-    background: #f39c12;
+    background: var(--warning-color);
     animation: confetti-fall 3s linear infinite;
 }
 
@@ -833,6 +951,7 @@ body.modal-open {
         transform: translateY(-100vh) rotate(0deg);
         opacity: 1;
     }
+
     100% {
         transform: translateY(100vh) rotate(720deg);
         opacity: 0;