/* Central theme variables and helpers - Professional Blue & White Travel Theme
   Modern and attractive color scheme perfect for travel booking websites
   Place all color tokens and small helpers here so changing theme is a single-file edit
*/
:root {
    /* Primary Blue Theme - Professional Travel Colors */
    --primary-blue: #2563eb;          /* main brand blue */
    --primary-blue-dark: #1d4ed8;     /* darker blue for hover */
    --accent-blue: #3b82f6;          /* lighter accent blue */
    --secondary-blue: #1e40af;       /* deep blue for depth */
    --light-blue: #dbeafe;           /* very light blue for backgrounds */
    
    /* Complementary Colors */
    --ocean-blue: #0ea5e9;           /* vibrant ocean blue */
    --sky-blue: #0284c7;            /* sky blue accent */
    --navy-blue: #1e3a8a;           /* navy for headers */
    
    /* White & Gray Scale */
    --pure-white: #ffffff;
    --off-white: #fafafa;
    --light-gray: #f1f5f9;          /* very light background */
    --medium-gray: #64748b;         /* text gray */
    --dark-gray: #334155;           /* dark text */
    --border-gray: #e2e8f0;         /* subtle borders */
    
    /* Success & Status Colors */
    --success-green: #10b981;       /* success actions */
    --warning-orange: #f59e0b;      /* warnings */
    --danger-red: #ef4444;          /* errors */
    
    /* Gradients - Travel Inspired */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 50%, var(--ocean-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--pure-white) 0%, var(--light-gray) 100%);
    --gradient-hero: linear-gradient(135deg, var(--navy-blue) 0%, var(--primary-blue) 50%, var(--sky-blue) 100%);
    --gradient-card: linear-gradient(145deg, var(--pure-white) 0%, var(--off-white) 100%);
    
    /* Advanced Gradients for Modern Look */
    --gradient-ocean: linear-gradient(120deg, #a8edea 0%, #fed6e3 100%);
    --gradient-sky: linear-gradient(120deg, #d299c2 0%, #fef9d7 100%);
    --gradient-sunset: linear-gradient(120deg, #89f7fe 0%, #66a6ff 100%);
    
    /* Shadows & Effects */
    --shadow-light: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-medium: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-heavy: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --shadow-blue: 0 8px 25px rgba(37, 99, 235, 0.15);
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Header/Footer/Button backgrounds - single place to change */
    --header-bg: var(--gradient-primary);
    --footer-bg: var(--gradient-hero);
    --button-bg: var(--primary-blue);
    --button-text: var(--pure-white);
    --button-hover-bg: var(--primary-blue-dark);
}

/* Button helper that uses theme tokens */
.btn-theme {
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 14px 28px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-blue);
    position: relative;
    overflow: hidden;
}

.btn-theme::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-theme:hover {
    background: var(--button-hover-bg);
    color: var(--button-text);
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.25);
}

.btn-theme:hover::before {
    left: 100%;
}

/* Common Button Styles for All Website Buttons */
.btn-primary, .btn-danger, .btn-success, .btn-warning, .btn-info {
    background: var(--primary-blue) !important;
    border-color: var(--primary-blue) !important;
    color: white !important;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover, .btn-danger:hover, .btn-success:hover, .btn-warning:hover, .btn-info:hover {
    background: var(--primary-blue-dark) !important;
    border-color: var(--primary-blue-dark) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.25);
}

/* Outline Button Styles */
.btn-outline-primary, .btn-outline-danger, .btn-outline-success, .btn-outline-warning, .btn-outline-info, .btn-outline-light, .btn-outline-dark {
    border: 2px solid var(--primary-blue) !important;
    color: var(--primary-blue) !important;
    background: transparent;
    font-weight: 600;
    padding: 10px 22px;
    border-radius: var(--radius-full);
    transition: var(--transition-normal);
}

.btn-outline-primary:hover, .btn-outline-danger:hover, .btn-outline-success:hover, .btn-outline-warning:hover, .btn-outline-info:hover, .btn-outline-light:hover, .btn-outline-dark:hover {
    background: var(--primary-blue) !important;
    border-color: var(--primary-blue) !important;
    color: white !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

/* Secondary Button Style */
.btn-theme-outline {
    background: transparent;
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
    padding: 12px 26px;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: var(--transition-normal);
}

.btn-theme-outline:hover {
    background: var(--primary-blue);
    color: var(--pure-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue);
}

/* Header / footer helper classes */
.bg-header-theme { 
    background: var(--header-bg) !important; 
}

.bg-footer-theme { 
    background: var(--footer-bg) !important; 
}

.bg-gradient-ocean { 
    background: var(--gradient-ocean) !important; 
}

.bg-gradient-sky { 
    background: var(--gradient-sky) !important; 
}

.bg-gradient-sunset { 
    background: var(--gradient-sunset) !important; 
}

/* Card Styles */
.card-theme {
    background: var(--gradient-card);
    border: 1px solid var(--border-gray);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    transition: var(--transition-normal);
}

.card-theme:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

/* Accent underline helper */
.underline-accent {
    height: 4px;
    width: 90px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-blue));
    border-radius: var(--radius-sm);
    margin: 0 auto;
}

/* Icon hover effects */
.theme-hover-glow:hover {
    box-shadow: var(--shadow-blue);
    transform: translateY(-3px);
    transition: var(--transition-normal);
}

/* Text color utilities */
.text-theme-primary { color: var(--primary-blue) !important; }
.text-theme-secondary { color: var(--medium-gray) !important; }
.text-theme-dark { color: var(--dark-gray) !important; }

/* Background utilities */
.bg-theme-light { background: var(--light-gray) !important; }
.bg-theme-white { background: var(--pure-white) !important; }
.bg-theme-blue { background: var(--light-blue) !important; }

/* Feature card enhancements */
.feature-card-modern {
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-card);
    transition: var(--transition-normal);
    border: 1px solid var(--border-gray);
}

.feature-card-modern:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--accent-blue);
}

/* Icon containers */
.icon-container {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--pure-white);
    box-shadow: var(--shadow-blue);
    margin: 0 auto 1rem;
}

/* Modern form inputs */
.form-control-theme {
    border: 2px solid var(--border-gray);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    transition: var(--transition-normal);
    font-size: 0.95rem;
}

.form-control-theme:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    outline: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .btn-theme {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .feature-card-modern {
        padding: 1.5rem;
    }
    
    .icon-container {
        width: 50px;
        height: 50px;
    }
}

/* Animation classes */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

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

/* Professional section styling */
.section-modern {
    padding: 80px 0;
    position: relative;
}

.section-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(37, 99, 235, 0.02) 50%, transparent 70%);
    pointer-events: none;
}