/* ============================================
   HABITAT CALCULATOR - LAYOUT STYLES
   Mobile-First SPA Layout
   ============================================ */

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

html, body {
    font-family: var(--font-family, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif);
    background-color: var(--bg-primary, #ffffff);
    color: var(--text-primary, #2c3e50);
    height: 100%;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Main Layout */
.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Sticky Header */
.sticky-header {
    position: sticky;
    top: 0;
    z-index: 1020;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

/* Content Area */
.app-content {
    flex: 1;
    padding: var(--space-md, 16px);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Footer */
.app-footer {
    border-top: 1px solid var(--pastel-gray, #e8e8e8);
    flex-shrink: 0;
}

.cursor-pointer {
    cursor: pointer;
}

/* Section Styling */
.section {
    padding: var(--space-lg, 24px) var(--space-md, 16px);
    scroll-margin-top: 60px;
}

.section-title {
    font-size: var(--font-size-2xl, 32px);
    font-weight: 600;
    color: var(--text-primary, #2c3e50);
    margin-bottom: var(--space-lg, 24px);
    text-align: center;
}

/* Hero Icon */
.hero-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Language Switcher */
.lang-btn {
    background: var(--bg-secondary, #ffffff);
    border: 1px solid var(--border-color, #e8e8e8);
    border-radius: var(--radius-full, 9999px);
    padding: var(--space-xs, 4px) var(--space-sm, 8px);
    font-size: var(--font-size-sm, 14px);
    font-weight: 500;
    color: var(--text-secondary, #5a6c7d);
    cursor: pointer;
    transition: all var(--transition-fast, 0.15s ease-in-out);
    min-height: 36px;
    min-width: 44px;
}

.lang-btn:hover {
    background: var(--bg-tertiary, #f5f5f5);
    border-color: var(--primary, #8ecae6);
    color: var(--primary, #8ecae6);
}

/* Responsive */
@media (max-width: 768px) {
    .section {
        padding: var(--space-md, 16px);
    }

    .app-content {
        padding: var(--space-sm, 8px);
    }

    .section-title {
        font-size: var(--font-size-xl, 24px);
    }

    /* Keep navbar brand and language switcher visible on mobile */
    .navbar .navbar-brand {
        font-size: 1.1rem;
    }

    /* Ensure cards don't break layout on narrow screens */
    .card-body .row .col-6,
    .card-body .row .col-md-3 {
        min-width: 0;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
}

@media (min-width: 769px) {
    .app-content {
        padding: var(--space-lg, 24px);
    }
}