/* ====================================
   MAIN STYLES - CMA Tool Frontend
   ==================================== */

/* Import Design System */
@import url('design-system.css');

/* ====================================
   APP HEADER & NAVIGATION
   ==================================== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.app-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: var(--text-inverse);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-branding {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.app-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.025em;
    margin: 0;
}

.header-subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    font-weight: var(--font-weight-normal);
}

.header-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-inverse);
    font-weight: var(--font-weight-medium);
    transition: opacity var(--transition-base);
    opacity: 0.9;
}

.nav-link:hover {
    opacity: 1;
}

/* ====================================
   MAIN CONTENT AREA
   ==================================== */
.main-content {
    flex: 1;
    padding: var(--spacing-2xl) var(--spacing-lg);
    animation: fadeIn 0.3s ease-in-out;
}

.landing-container {
    max-width: 900px;
    margin: 0 auto;
}

/* ====================================
   SEARCH SECTION
   ==================================== */
.search-section {
    background: var(--surface);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-3xl);
    border: 1px solid var(--border);
    background: linear-gradient(135deg, var(--surface) 0%, var(--bg-primary) 100%);
}

.search-section h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.search-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
}

.search-box {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.address-input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    background: var(--bg-primary);
}

.address-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    background: var(--surface);
}

.address-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    background: var(--accent);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
}

.search-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.search-btn:active:not(:disabled) {
    transform: translateY(0);
}

.search-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.search-btn .loading {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ====================================
   ERROR MESSAGES
   ==================================== */
.error-message {
    color: var(--error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--error-light);
    border-radius: var(--radius-md);
    display: none;
    animation: slideInUp 0.3s ease-out;
}

.error-message.active {
    display: block;
}

/* ====================================
   API KEY ERROR BANNER & TOAST
   ==================================== */
.api-key-error-banner {
    background: linear-gradient(135deg, #fee 0%, #fdd 100%);
    border: 2px solid var(--error);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-md);
    animation: slideInDown 0.4s ease-out;
    position: relative;
}

.api-key-error-banner .banner-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.api-key-error-banner .banner-content {
    flex: 1;
}

.api-key-error-banner h3 {
    color: var(--error);
    margin: 0 0 var(--spacing-sm) 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

.api-key-error-banner p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    line-height: 1.6;
}

.api-key-error-banner .banner-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--error);
    opacity: 0.7;
    transition: opacity var(--transition-base);
}

.api-key-error-banner .banner-close:hover {
    opacity: 1;
}

.api-key-error-banner .config-help {
    margin-top: var(--spacing-md);
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
}

.api-key-error-banner .config-help summary {
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    color: var(--error);
    user-select: none;
    list-style: none;
    padding: var(--spacing-sm);
}

.api-key-error-banner .config-help summary::-webkit-details-marker {
    display: none;
}

.api-key-error-banner .config-help summary::before {
    content: '▶ ';
    display: inline-block;
    transition: transform var(--transition-base);
}

.api-key-error-banner .config-help[open] summary::before {
    transform: rotate(90deg);
}

.api-key-error-banner .config-instructions {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.api-key-error-banner .config-instructions ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

.api-key-error-banner .config-instructions li {
    margin-bottom: var(--spacing-xs);
}

.api-key-error-banner code {
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--error);
}

.api-key-error-banner a {
    color: var(--error);
    text-decoration: underline;
}

/* Toast Container */
#toast-container {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}

/* API Key Error Toast */
.api-key-error-toast {
    background: white;
    border-left: 4px solid var(--error);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: slideInRight 0.3s ease-out;
}

.api-key-error-toast .toast-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: #fee;
    border-bottom: 1px solid var(--border);
}

.api-key-error-toast .toast-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--error);
}

.api-key-error-toast .toast-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--error);
    opacity: 0.7;
    transition: opacity var(--transition-base);
    padding: 0;
    line-height: 1;
}

.api-key-error-toast .toast-close:hover {
    opacity: 1;
}

.api-key-error-toast .toast-body {
    padding: var(--spacing-md);
}

.api-key-error-toast .error-message {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ====================================
   FEATURES SECTION
   ==================================== */
.features-section {
    margin-top: var(--spacing-3xl);
}

.features-section h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    border: 1px solid var(--border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-number {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.feature-card h4 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* ====================================
   LOADING STATES
   ==================================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
}

.loading-content {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    text-align: center;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg);
    animation: spin 1s linear infinite;
}

.loading-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.loading-subtext {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ====================================
   ANIMATIONS
   ==================================== */
@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */
@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-md) 0;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .app-title {
        font-size: var(--font-size-xl);
    }
    
    .main-content {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .search-section {
        padding: var(--spacing-lg);
    }
    
    .search-section h2 {
        font-size: var(--font-size-2xl);
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
}