/* ============================================
   Modern UI Framework - Utilities & Components
   CSS Variables root.css'ten gelir
   Mobile-First, Best Practices Implementation
   ============================================ */

/* ===== CSS Reset ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== Responsive Container System ===== */
.container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

@media (min-width: 480px) {
    .container {
        max-width: var(--container-sm);
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }
}

@media (min-width: 768px) {
    .container {
        max-width: var(--container-md);
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: var(--container-lg);
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: var(--container-xl);
    }
}

@media (min-width: 1536px) {
    .container {
        max-width: var(--container-2xl);
    }
}

/* ===== Responsive Grid System (CSS Grid) ===== */
.grid {
    display: grid;
    gap: var(--grid-gap-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Auto-fit grid for responsive cards */
.grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.grid-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr));
}

/* Responsive Grid Breakpoints */
@media (min-width: 480px) {
    .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
    .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .md\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
    .lg\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

/* ===== Flexbox Utilities ===== */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* ===== Touch-Friendly Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(255, 107, 53, 0.2);
    user-select: none;
    -webkit-user-select: none;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--orange-primary, #ff6b35);
    outline-offset: 2px;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
    box-shadow: var(--shadow-orange);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-secondary);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--orange-primary);
    color: var(--orange-primary);
}

.btn-outline:hover {
    background: var(--orange-rgba-10);
    border-color: var(--orange-light);
}

.btn-ghost {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-primary);
}

.btn-ghost:hover {
    background: var(--bg-hover);
}

.btn-block {
    width: 100%;
    display: flex;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
    min-height: 52px;
}

/* Button with Icon */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    padding: 0;
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* ===== Form Elements - Mobile Optimized ===== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary, #e0e0e0);
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.form-label.required::after {
    content: ' *';
    color: var(--danger, #f44336);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 16px; /* Prevents zoom on iOS */
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    min-height: var(--touch-target-min);
    transition: all var(--transition-base);
    -webkit-appearance: none;
    appearance: none;
    touch-action: manipulation;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--orange-primary);
    box-shadow: 0 0 0 3px var(--orange-rgba-10);
    background-color: var(--bg-secondary);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
    font-family: inherit;
}

.form-error {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--danger, #f44336);
    margin-top: var(--spacing-xs);
}

.form-help {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-muted, #888888);
    margin-top: var(--spacing-xs);
}

/* Input Group */
.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-group-row {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-sm);
}

@media (max-width: 767px) {
    .input-group-row {
        flex-direction: column;
    }
}

/* Checkbox & Radio */
.checkbox,
.radio {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: var(--touch-target-min);
    cursor: pointer;
    touch-action: manipulation;
}

.checkbox input[type="checkbox"],
.radio input[type="radio"] {
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    accent-color: var(--orange-primary, #ff6b35);
    cursor: pointer;
    touch-action: manipulation;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-secondary, #2a2a3e);
    border: 1px solid var(--bg-tertiary, #35354a);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card-header {
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--bg-tertiary, #35354a);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary, #e0e0e0);
    margin: 0;
}

.card-body {
    padding: var(--spacing-md) 0;
}

.card-footer {
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-top: 1px solid var(--bg-tertiary, #35354a);
}

/* ===== Alerts & Notifications ===== */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
    line-height: 1.6;
}

.alert-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
}

.alert-content {
    flex: 1;
    min-width: 0;
}

.alert-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.alert-success {
    background: rgba(76, 175, 80, 0.1);
    border-color: var(--success, #4caf50);
    color: var(--success, #4caf50);
}

.alert-error,
.alert-danger {
    background: rgba(244, 67, 54, 0.1);
    border-color: var(--danger, #f44336);
    color: var(--danger, #f44336);
}

.alert-warning {
    background: rgba(255, 152, 0, 0.1);
    border-color: var(--warning, #ff9800);
    color: var(--warning, #ff9800);
}

.alert-info {
    background: rgba(33, 150, 243, 0.1);
    border-color: var(--info, #2196f3);
    color: var(--info, #2196f3);
}

/* ===== Loading States ===== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 107, 53, 0.2);
    border-top-color: var(--orange-primary, #ff6b35);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

/* ===== Empty States ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-md);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary, #e0e0e0);
}

.empty-state-text {
    font-size: var(--font-size-base);
    color: var(--text-secondary, #b0b0b0);
    margin-bottom: var(--spacing-lg);
}

/* ===== Responsive Images ===== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

.img-responsive {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.img-lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

.img-lazy.loaded {
    opacity: 1;
}

/* ===== Accessibility ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--orange-primary, #ff6b35);
    color: var(--text-white, #ffffff);
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-tooltip);
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* Focus Visible */
*:focus-visible {
    outline: 2px solid var(--orange-primary, #ff6b35);
    outline-offset: 2px;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* ===== Print Styles ===== */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .btn,
    .header,
    .sidebar,
    .footer {
        display: none !important;
    }
}

/* ===== Toast Notifications ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary, #2a2a3e);
    color: var(--text-primary, #e0e0e0);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-toast);
    min-width: 280px;
    max-width: calc(100vw - var(--spacing-xl));
    opacity: 0;
    transition: all var(--transition-base);
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-success {
    border-color: var(--success, #4caf50);
    background: rgba(76, 175, 80, 0.15);
}

.toast-error,
.toast-danger {
    border-color: var(--danger, #f44336);
    background: rgba(244, 67, 54, 0.15);
}

.toast-warning {
    border-color: var(--warning, #ff9800);
    background: rgba(255, 152, 0, 0.15);
}

.toast-info {
    border-color: var(--info, #2196f3);
    background: rgba(33, 150, 243, 0.15);
}

@media (max-width: 768px) {
    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        transform: translateY(100px);
        min-width: auto;
        max-width: none;
    }
    
    .toast.show {
        transform: translateY(0);
    }
}

/* ===== Fixed Header/Footer ===== */
.header-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.footer-fixed {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

/* Content padding when header/footer is fixed */
.has-fixed-header {
    padding-top: var(--header-height, 64px);
}

.has-fixed-footer {
    padding-bottom: var(--footer-height, 64px);
}

/* ===== Scrollbar Styling ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary, #2a2a3e);
}

::-webkit-scrollbar-thumb {
    background: var(--orange-primary, #ff6b35);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--orange-secondary, #ff8c42);
}

/* Mobile scrollbar */
@media (max-width: 768px) {
    ::-webkit-scrollbar {
        width: 6px;
        height: 6px;
    }
}

/* ===== Selection ===== */
::selection {
    background: var(--orange-primary, #ff6b35);
    color: var(--text-white, #ffffff);
}

::-moz-selection {
    background: var(--orange-primary, #ff6b35);
    color: var(--text-white, #ffffff);
}

/* ===== Reduced Motion ===== */
@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;
    }
}

/* ===== High Contrast Mode ===== */
@media (prefers-contrast: high) {
    :root {
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    }
    
    .btn {
        border-width: 2px;
    }
}

/* ===== Dark Mode Support ===== */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
    }
}