/* ================= VARIABLES & RESETS ================= */
:root {
    /* New Color Theme - Modern Blue & Teal Gradient */
    --primary-color: #2980B9;
    --primary-dark: #1D6FA5;
    --primary-light: #3498DB;
    --secondary-color: #16A085;
    --secondary-dark: #0E8C73;
    --secondary-light: #1ABC9C;
    --accent-color: #F39C12;
    --surface-color: #FFFFFF;
    --background-main: #F8FAFC;
    --text-primary: #2C3E50;
    --text-secondary: #34495E;
    --text-tertiary: #7F8C8D;
    --text-on-primary: #FFFFFF;
    --text-on-secondary: #FFFFFF;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.2);
    --shadow-inset: inset 0 2px 6px rgba(0, 0, 0, 0.1);
    
    /* Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-medium: 0.25s ease-in-out;
    --transition-slow: 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-bounce: 0.5s cubic-bezier(0.25, 0.8, 0.25, 1.2);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;
    
    /* Fonts */
    --font-main: 'Outfit', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-xxl: 1.5rem;
    --font-size-xxxl: 2rem;
    --font-size-huge: 2.5rem;
    
    /* Z-index layers */
    --z-background: -10;
    --z-normal: 1;
    --z-elevated: 10;
    --z-modal: 100;
    --z-toast: 1000;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-main);
    background-color: var(--background-main);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #EBF5FB 0%, #E8F8F5 100%);
}

button, a {
    font-family: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

/* ================= LAYOUT COMPONENTS ================= */
.app-container {
    min-height: 100vh;
    width: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.app-header {
    padding: var(--space-md) var(--space-xl);
    width: 100%;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: var(--z-elevated);
}

.logo-container {
    width: 140px;
}

.logo {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.main-content {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-md);
    position: relative;
    z-index: var(--z-normal);
}

.card {
    width: 100%;
    max-width: 480px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: var(--surface-color);
    box-shadow: var(--shadow-lg);
    position: relative;
    transform: translateY(0);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.card-content {
    padding: var(--space-xl);
}

.welcome-section {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.app-title {
    font-size: var(--font-size-huge);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
    line-height: 1.1;
}

.highlight {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-full);
    opacity: 0.6;
}

.app-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-tertiary);
    font-weight: 400;
}

.visual-section {
    margin: var(--space-xl) 0;
    position: relative;
}

.image-container {
    width: 75%;
    margin: 0 auto;
    position: relative;
    z-index: var(--z-normal);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.feature-image {
    width: 100%;
    display: block;
    transform: scale(1);
    transition: transform var(--transition-slow);
}

.image-container:hover .feature-image {
    transform: scale(1.04);
}

.image-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.4), transparent);
    z-index: 1;
}

.accent-shape {
    position: absolute;
    border-radius: var(--radius-full);
    z-index: -1;
}

.accent-shape-1 {
    width: 140px;
    height: 140px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    top: -60px;
    right: -30px;
    opacity: 0.1;
    filter: blur(30px);
}

.accent-shape-2 {
    width: 180px;
    height: 180px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-light));
    bottom: -80px;
    left: -40px;
    opacity: 0.1;
    filter: blur(40px);
}

.action-section {
    margin-top: var(--space-xxl);
}

.section-title {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-lg);
}

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

.button-separator {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin: var(--space-xs) 0;
}

.separator-line {
    flex: 1;
    height: 1px;
    background-color: rgba(127, 140, 141, 0.2);
}

.separator-text {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.action-button {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-medium);
    color: var(--text-on-primary);
    position: relative;
    overflow: hidden;
    z-index: var(--z-normal);
}

.action-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
    opacity: 0;
    transition: opacity var(--transition-medium);
    z-index: -1;
}

.action-button:hover::before {
    opacity: 1;
}

.passenger-button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: 0 4px 12px rgba(41, 128, 185, 0.3);
}

.passenger-button:hover {
    box-shadow: 0 6px 16px rgba(41, 128, 185, 0.4);
    transform: translateY(-2px);
}

.captain-button {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    box-shadow: 0 4px 12px rgba(22, 160, 133, 0.3);
}

.captain-button:hover {
    box-shadow: 0 6px 16px rgba(22, 160, 133, 0.4);
    transform: translateY(-2px);
}

.button-icon {
    font-size: var(--font-size-xl);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
}

.button-content {
    flex: 1;
    text-align: left;
}

.button-title {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.button-description {
    display: block;
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.button-arrow {
    font-size: var(--font-size-md);
    transition: transform var(--transition-medium);
}

.action-button:hover .button-arrow {
    transform: translateX(4px);
}

.action-button:active {
    transform: translateY(1px);
}

/* ================= FOOTER ================= */
.app-footer {
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    z-index: var(--z-normal);
}

.footer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-link {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    background-color: rgba(0, 0, 0, 0.03);
    transition: all var(--transition-medium);
}

.social-link:hover {
    color: var(--text-on-primary);
    background-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.copyright {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* ================= BACKGROUND ELEMENTS ================= */
.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-background);
    pointer-events: none;
    overflow: hidden;
}

.bg-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
}

.bg-shape-1 {
    top: -10%;
    right: -5%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.05) 0%, rgba(52, 152, 219, 0) 70%);
}

.bg-shape-2 {
    bottom: -15%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(22, 160, 133, 0.05) 0%, rgba(22, 160, 133, 0) 70%);
}

.bg-shape-3 {
    top: 40%;
    left: 45%;
    width: 25vw;
    height: 25vw;
    background: radial-gradient(circle, rgba(243, 156, 18, 0.03) 0%, rgba(243, 156, 18, 0) 70%);
}

/* ================= RESPONSIVE DESIGN ================= */
@media (max-width: 768px) {
    :root {
        --font-size-huge: 2.2rem;
    }
    
    .main-content {
        padding: var(--space-md) var(--space-md);
    }
    
    .card-content {
        padding: var(--space-lg);
    }
    
    .action-button {
        padding: var(--space-md);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-huge: 1.8rem;
        --font-size-xxxl: 1.7rem;
        --font-size-xxl: 1.4rem;
        --font-size-xl: 1.1rem;
    }
    
    .app-header {
        padding: var(--space-md);
    }
    
    .logo-container {
        width: 120px;
    }
    
    .card-content {
        padding: var(--space-lg) var(--space-md);
    }
    
    .visual-section {
        margin: var(--space-lg) 0;
    }
    
    .image-container {
        width: 85%;
    }
    
    .action-section {
        margin-top: var(--space-xl);
    }
    
    .app-footer {
        padding: var(--space-md);
    }
    
    .footer-row {
        flex-direction: column;
        align-items: center;
        gap: var(--space-md);
    }
    
    .footer-links {
        gap: var(--space-md);
    }
}

@media (max-height: 700px) {
    .card {
        margin: var(--space-md) 0;
    }
    
    .welcome-section {
        margin-bottom: var(--space-md);
    }
    
    .visual-section {
        margin: var(--space-md) 0;
    }
    
    .image-container {
        width: 60%;
    }
    
    .action-section {
        margin-top: var(--space-lg);
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ================= PRINT STYLES ================= */
@media print {
    .app-container {
        display: block;
        height: auto;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .action-button {
        border: 1px solid #000;
        background: #fff !important;
        color: #000 !important;
    }
    
    .background-elements,
    .accent-shape {
        display: none;
    }
}