/*
 * Atomic Components
 * Reusable UI elements: Buttons, Inputs, Cards, Navigation
 */

/* ==================
   Buttons
   ================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    /* 12px 24px */
    border-radius: var(--radius-full);
    font-weight: 500;
    font-size: var(--text-sm);
    line-height: var(--leading-tight);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-smooth);
    border: 1px solid transparent;
    gap: var(--space-2);
    white-space: nowrap;
}

.btn-lg {
    padding: 1rem 1.5rem;
    font-size: var(--text-sm);
    font-weight: 600;
    white-space: normal; /* Allow wrapping on small screens */
    text-align: center;
}

@media (min-width: 768px) {
    .btn-lg {
        padding: 1.25rem 2.5rem;
        font-size: var(--text-base);
        white-space: nowrap;
    }
}

/* Primary Button */
.btn-primary {
    background-color: var(--action-primary-bg);
    color: var(--action-primary-text);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--action-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn-secondary {
    background-color: var(--action-secondary-bg);
    color: var(--action-secondary-text);
    border-color: var(--action-secondary-border);
}

.btn-secondary:hover {
    background-color: var(--action-secondary-hover-bg);
    color: var(--text-primary);
    border-color: var(--text-primary);
    /* Slight darkening on hover */
}

/* Ghost Button (for Nav) */
.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background-color: var(--action-secondary-hover-bg);
}

/* ==================
   Cards / Surfaces
   ================== */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: transform var(--duration-normal) var(--ease-smooth), box-shadow var(--duration-normal) var(--ease-smooth), border-color var(--duration-normal);
    overflow: hidden;
    /* For inner content clipping */
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-focus);
    /* Subtle highlight */
}

.card-glass {
    background: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-light);
}

/* ==================
   Navigation
   ================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 100px;
    display: flex;
    align-items: center;
    background: hsla(var(--gray-0), 0.85); /* More opaque white in light mode by default */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: height var(--duration-normal), background var(--duration-normal), box-shadow var(--duration-normal);
}

:root[data-theme="dark"] .header {
    background: hsla(var(--gray-900), 0.7); /* Darker glass for dark mode */
}

.header.scrolled {
    height: 70px;
    background: var(--bg-surface-glass);
    box-shadow: var(--shadow-md);
}

/* Logo Visibility: Dark for light mode (on white BG) */
.header-logo,
.footer-logo {
    filter: brightness(0);
    transition: filter var(--duration-normal), height var(--duration-normal);
}

.header-logo {
    height: 80px;
    width: auto;
}

/* Dark Mode: Original Colors (White/Cyan) */
@media (prefers-color-scheme: dark) {

    :root:not([data-theme="light"]) .header-logo,
    :root:not([data-theme="light"]) .footer-logo {
        filter: none;
    }
}

:root[data-theme="dark"] .header-logo,
:root[data-theme="dark"] .footer-logo {
    filter: none;
}

.header.scrolled .header-logo {
    height: 50px;
}

/* Navbar container adjustment */
.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: color var(--duration-fast), background-color var(--duration-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--action-secondary-hover-bg);
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: var(--space-2);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: background-color var(--duration-fast), color var(--duration-fast);
}

.theme-toggle:hover {
    background-color: var(--action-secondary-hover-bg);
    color: var(--text-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* Base Icon Visibility */
.theme-toggle .icon-sun {
    display: none;
}

.theme-toggle .icon-moon {
    display: block;
}

/* Manual Theme Setting Overrides */
:root[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

/* OS Native Support */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun {
        display: block;
    }

    :root:not([data-theme="light"]) .theme-toggle .icon-moon {
        display: none;
    }
}

/* Mobile Navigation */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: var(--space-2);
    cursor: pointer;
    z-index: 1001;
    /* Above mobile nav */
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--bg-surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-smooth);
}

.mobile-nav.is-open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav .nav-link {
    font-size: var(--text-xl);
    font-weight: 600;
}

@media (max-width: 767px) {
    .hidden-mobile {
        display: none !important;
    }

    .mobile-menu-btn {
        display: block;
    }
}

/* ==================
   Inputs (For Email Capture)
   ================== */
.input-group {
    display: flex;
    gap: var(--space-2);
}

.input {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-medium);
    background: var(--bg-surface);
    font-size: var(--text-sm);
    color: var(--text-primary);
    transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}

.input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 2px var(--border-focus);
}

/* ==================
   Badges / Tags
   ================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-brand {
    background-color: hsla(var(--color-brand-light), 0.15);
    color: hsl(var(--color-brand-main));
    border: 1px solid hsla(var(--color-brand-light), 0.3);
}

/* ==================
  Feature Icons (Placeholder)
  ================== */
.icon-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-light);
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}