/* ==========================================================================
   ButterFalcon - Shared Styles
   ========================================================================== */

/* ==========================================================================
   1. CSS Variables & Reset
   ========================================================================== */
:root {
    --primary-color: #2C3E50;
    --accent-color: #E67E22;
    --bg-color: #F5F6FA;
    --white: #ffffff;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --border-radius: 8px;
}

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

/* ==========================================================================
   2. Typography
   ========================================================================== */
body {
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--bg-color);
}

h1 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* ==========================================================================
   3. Layout
   ========================================================================== */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

main {
    padding: 4rem 0;
}

/* ==========================================================================
   4. Header & Navigation
   ========================================================================== */
header {
    background-color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo span {
    color: var(--primary-color);
}

/* Navigation */
.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background: var(--primary-color);
    height: 2px;
    width: 24px;
    border-radius: 2px;
    position: relative;
    transition: all 0.3s ease;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    top: -7px;
}

.nav-toggle-label span::after {
    top: 7px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
    color: var(--accent-color);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

nav a:hover::after,
nav a.active::after {
    width: 100%;
}

/* ==========================================================================
   5. Company Info (index.html)
   ========================================================================== */
.company-info {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--shadow);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table th,
.info-table td {
    padding: 1.5rem;
    border-bottom: 1px solid #eee;
}

.info-table th {
    width: 25%;
    text-align: left;
    vertical-align: top;
}

.business-description {
    margin-top: 2rem;
}

.business-description ul {
    list-style: none;
}

.business-description li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.business-description li::before {
    content: "\2022";
    color: var(--accent-color);
    position: absolute;
    left: 0;
}

/* ==========================================================================
   6. Apps Page (apps.html)
   ========================================================================== */
.page-intro {
    text-align: center;
    margin-bottom: 3rem;
    color: #666;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.app-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
}

.app-icon {
    width: 120px;
    height: 120px;
    margin-bottom: 1.5rem;
    object-fit: cover;
}

.app-card h2 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.app-description {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

/* Store Badges */
.app-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.store-badge {
    display: inline-block;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.store-badge:hover {
    opacity: 0.8;
    transform: scale(1.05);
}

.store-badge img {
    height: 40px;
    width: auto;
}

/* Web App Button */
.web-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #000;
    color: var(--white);
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.web-badge:hover {
    opacity: 0.8;
}

.web-badge svg {
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   7. Footer
   ========================================================================== */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 2rem 0;
    margin-top: 4rem;
}

footer p {
    text-align: center;
    font-size: 0.9rem;
}

/* ==========================================================================
   8. Responsive
   ========================================================================== */
@media (max-width: 768px) {
    /* Mobile Navigation */
    .nav-toggle-label {
        display: block;
    }

    nav {
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        background: var(--white);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        transform: scaleY(0);
        transform-origin: top;
        transition: transform 0.3s ease;
    }

    .nav-toggle:checked ~ nav {
        transform: scaleY(1);
    }

    nav ul {
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
    }

    nav li {
        text-align: center;
    }

    nav a {
        display: block;
        padding: 1rem 2rem;
    }

    nav a::after {
        display: none;
    }

    /* Hamburger Animation */
    .nav-toggle:checked ~ .nav-toggle-label span {
        background: transparent;
    }

    .nav-toggle:checked ~ .nav-toggle-label span::before {
        top: 0;
        transform: rotate(45deg);
    }

    .nav-toggle:checked ~ .nav-toggle-label span::after {
        top: 0;
        transform: rotate(-45deg);
    }

    /* Table Responsive */
    .info-table th,
    .info-table td {
        display: block;
        width: 100%;
    }

    .info-table th {
        padding-bottom: 0.5rem;
    }

    .info-table td {
        padding-top: 0.5rem;
    }

    /* Apps Grid */
    .apps-grid {
        grid-template-columns: 1fr;
    }

    .company-info {
        padding: 2rem 1.5rem;
    }
}