/* ========================================
   GLOBAL STYLES - BRAND COLORS
======================================== */
:root {
    --primary-color: #28a745;      /* Green */
    --secondary-color: #1e3a8a;    /* Navy Blue */
    --accent-color: #ffffff;       /* White */
    --success-color: #28a745;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --dark-bg: #0a1628;            /* Dark Navy */
    --darker-bg: #050d1a;          /* Darker Navy */
    --card-bg: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-bg) 50%, var(--darker-bg) 100%);
    min-height: 100vh;
    color: #fff;
    overflow-x: hidden;
}

/* ========================================
   LANDING PAGE STYLES
======================================== */
.landing-page {
    position: relative;
    overflow: hidden;
}

.hero-section {
    position: relative;
    z-index: 1;
}

/* Gradient Text - Brand Colors */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 50%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradient-shift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* Logo Animation */
.logo-container i {
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(40, 167, 69, 0.6));
    color: var(--primary-color);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Button Styles - Brand Colors */
.btn-primary,
.btn-success {
    background: linear-gradient(135deg, var(--primary-color), #20c997);
    border: none;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    color: white;
}

.btn-primary::before,
.btn-success::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;
}

.btn-primary:hover::before,
.btn-success:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover,
.btn-success:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(40, 167, 69, 0.5);
    background: linear-gradient(135deg, #20c997, var(--primary-color));
}

.btn-outline-light {
    border: 2px solid #fff;
    font-weight: 600;
    transition: all 0.3s ease;
    color: white;
}

.btn-outline-light:hover {
    background: #fff;
    color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

/* Stat Cards - Brand Colors */
.stat-card {
    transition: all 0.3s ease;
    border-width: 2px;
    backdrop-filter: blur(10px);
    background: rgba(30, 58, 138, 0.3);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(40, 167, 69, 0.4);
}

.border-success {
    border-color: var(--primary-color) !important;
}

.border-info {
    border-color: var(--accent-color) !important;
}

.border-warning {
    border-color: var(--primary-color) !important;
}

.text-warning {
    color: var(--primary-color) !important;
}

.text-info {
    color: var(--accent-color) !important;
}

/* Floating Music Notes Background - Green */
.music-notes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.music-notes i {
    position: absolute;
    font-size: 3rem;
    opacity: 0.1;
    color: var(--primary-color);
    animation: float-notes 20s infinite;
}

.note1 {
    left: 10%;
    top: 20%;
    animation-delay: 0s;
}

.note2 {
    left: 80%;
    top: 40%;
    animation-delay: 4s;
    font-size: 4rem;
}

.note3 {
    left: 30%;
    top: 70%;
    animation-delay: 8s;
}

.note4 {
    left: 70%;
    top: 10%;
    animation-delay: 12s;
    font-size: 2.5rem;
}

.note5 {
    left: 50%;
    top: 85%;
    animation-delay: 16s;
}

@keyframes float-notes {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.1;
    }
    50% {
        transform: translateY(-100px) rotate(180deg);
        opacity: 0.3;
    }
}

/* ========================================
   MODAL STYLES
======================================== */
.modal-content {
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    background: linear-gradient(135deg, var(--secondary-color), var(--dark-bg));
}

.modal-header,
.modal-footer {
    border-color: var(--primary-color) !important;
}

.rule-item {
    padding: 15px;
    border-radius: 10px;
    background: rgba(40, 167, 69, 0.05);
    transition: all 0.3s ease;
    border-left: 3px solid var(--primary-color);
}

.rule-item:hover {
    background: rgba(40, 167, 69, 0.1);
    transform: translateX(10px);
    border-left-width: 5px;
}

.rule-item h6 {
    color: var(--primary-color) !important;
}

.alert-warning {
    background: rgba(40, 167, 69, 0.2);
    border-color: var(--primary-color);
    color: white;
}

/* ========================================
   RESPONSIVE DESIGN
======================================== */
@media (max-width: 768px) {
    .display-3 {
        font-size: 2.5rem;
    }
    
    .btn-lg {
        padding: 12px 30px !important;
    }
    
    .music-notes i {
        font-size: 2rem;
    }
}

/* ========================================
   ANIMATION LIBRARY (AOS Alternative)
======================================== */
[data-aos] {
    opacity: 0;
    transition: all 0.8s ease;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   ADDITIONAL BRAND STYLING
======================================== */
.bg-primary {
    background: var(--primary-color) !important;
}

.bg-secondary {
    background: var(--secondary-color) !important;
}

.text-primary {
    color: var(--primary-color) !important;
}

.text-secondary {
    color: var(--secondary-color) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

.border-secondary {
    border-color: var(--secondary-color) !important;
}

/* ========================================
   REGISTRATION PAGE STYLES
======================================== */
.registration-page {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-bg) 100%);
}

.register-card {
    background: rgba(30, 58, 138, 0.3);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(40, 167, 69, 0.3);
}

.register-icon-wrapper {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #20c997);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    animation: pulse-icon 2s infinite;
}

.quiz-info-box {
    background: rgba(40, 167, 69, 0.1);
    border: 2px solid rgba(40, 167, 69, 0.3);
    border-radius: 10px;
    padding: 15px;
    color: white;
}

.form-check-input {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(40, 167, 69, 0.25);
}

/* Input animations */
.form-control:focus {
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .register-card .card-body {
        padding: 30px 20px !important;
    }
}

/* ========================================
   QUIZ PAGE STYLES
======================================== */
.quiz-page {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-bg) 100%);
}

.quiz-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid var(--primary-color);
}

.timer-display {
    font-size: 1.2rem;
}

.timer-warning {
    animation: pulse-warning 1s infinite;
}

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

.quiz-progress-bar {
    background: rgba(0, 0, 0, 0.3);
}

.quiz-card {
    background: rgba(30, 58, 138, 0.3);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(40, 167, 69, 0.3);
    min-height: 500px;
}

.question-text {
    font-size: 1.5rem;
    line-height: 1.6;
    min-height: 80px;
}

/* Option Buttons */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.option-item {
    transition: transform 0.2s ease;
}

.btn-option {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 20px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 15px;
}

.option-letter {
    background: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.option-text {
    flex: 1;
    text-align: left;
}

.btn-option:hover:not(.disabled) {
    background: rgba(40, 167, 69, 0.2);
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.btn-option.selected {
    background: rgba(40, 167, 69, 0.3);
    border-color: var(--primary-color);
    border-width: 3px;
}

.btn-option.correct {
    background: rgba(40, 167, 69, 0.3);
    border-color: #28a745;
    border-width: 3px;
}

.btn-option.correct .option-letter {
    background: #28a745;
}

.btn-option.incorrect {
    background: rgba(220, 53, 69, 0.2);
    border-color: #dc3545;
}

.btn-option.disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Hide default radio buttons */
.btn-check {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .question-text {
        font-size: 1.2rem;
        min-height: 60px;
    }
    
    .btn-option {
        padding: 15px;
        font-size: 1rem;
    }
    
    .option-letter {
        width: 35px;
        height: 35px;
    }
}
/* ========================================
   RESULTS PAGE
======================================== */
.results-page {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-bg) 100%);
}

.results-card {
    background: rgba(30, 58, 138, 0.3);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(40, 167, 69, 0.5);
}

.trophy-animation i {
    animation: trophy-bounce 2s infinite;
}

@keyframes trophy-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.score-circle {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.2), rgba(30, 58, 138, 0.2));
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 250px;
    height: 250px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.stat-box {
    padding: 20px;
    border-radius: 15px;
    color: white;
}

/* ========================================
   LEADERBOARD PAGE
======================================== */
.leaderboard-page {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-bg) 100%);
}

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

.leaderboard-table tbody tr:hover {
    background: rgba(40, 167, 69, 0.2);
    transform: translateX(5px);
}

.rank-1 {
    background: linear-gradient(90deg, rgba(255, 215, 0, 0.2), transparent);
    font-weight: bold;
}

.rank-2 {
    background: linear-gradient(90deg, rgba(192, 192, 192, 0.2), transparent);
}

.rank-3 {
    background: linear-gradient(90deg, rgba(205, 127, 50, 0.2), transparent);
}

.current-user {
    background: rgba(40, 167, 69, 0.3) !important;
    border-left: 5px solid var(--primary-color);
}

.rank-badge {
    font-size: 1.2rem;
    font-weight: bold;
}