/* ===========================
   Genel Stiller
   =========================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

/* ===========================
   Renk Şeması
   =========================== */

:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --secondary: #2ecc71;
    --danger: #e74c3c;
    --warning: #f39c12;
    --info: #3498db;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --gray: #95a5a6;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* ===========================
   Container
   =========================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===========================
   Header
   =========================== */

header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

header h1 {
    font-size: 28px;
    font-weight: 700;
    margin: 0;
}

header nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

header a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

header a:hover {
    opacity: 0.8;
}

/* ===========================
   Butonlar
   =========================== */

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    text-align: center;
    white-space: nowrap;
}

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

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, #1a5a7a 100%);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--white);
}

.btn-secondary:hover {
    background: #27ae60;
}

.btn-danger {
    background: var(--danger);
    color: var(--white);
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-icon {
    padding: 8px 12px;
    background: var(--light);
    color: var(--dark);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-icon:hover {
    background: var(--primary);
    color: var(--white);
}

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

/* ===========================
   Form Elemanları
   =========================== */

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="url"],
textarea,
select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--light);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s;
    background: var(--white);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===========================
   Kartlar
   =========================== */

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.card-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light);
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin: 0;
}

.card-body {
    margin-bottom: 20px;
}

.card-footer {
    padding-top: 15px;
    border-top: 2px solid var(--light);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* ===========================
   Alert Mesajları
   =========================== */

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    border-left: 4px solid;
    animation: slideIn 0.3s ease;
}

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

.alert-success {
    background: #d4edda;
    border-color: var(--secondary);
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    border-color: var(--danger);
    color: #721c24;
}

.alert-warning {
    background: #fff3cd;
    border-color: var(--warning);
    color: #856404;
}

.alert-info {
    background: #d1ecf1;
    border-color: var(--info);
    color: #0c5460;
}

/* ===========================
   Tablo
   =========================== */

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

thead {
    background: var(--light);
}

th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 2px solid #ddd;
}

td {
    padding: 15px;
    border-bottom: 1px solid #eee;
}

tbody tr:hover {
    background: var(--light);
}

/* ===========================
   Dinamik Alanlar
   =========================== */

.field-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    align-items: flex-end;
}

.field-group input,
.field-group select {
    flex: 1;
}

.field-group .btn-icon {
    flex-shrink: 0;
}

.add-field-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

/* ===========================
   QR Kod Önizleme
   =========================== */

.qr-preview {
    background: var(--white);
    border: 2px dashed var(--light);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    min-height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.qr-preview img {
    max-width: 300px;
    max-height: 300px;
    margin-bottom: 20px;
}

.qr-preview.empty {
    color: var(--gray);
}

/* ===========================
   Grid Sistemi
   =========================== */

.grid {
    display: grid;
    gap: 20px;
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ===========================
   Flex Utilities
   =========================== */

.flex {
    display: flex;
}

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

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

.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }
.gap-3 { gap: 30px; }

/* ===========================
   Spacing
   =========================== */

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }

.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }

/* ===========================
   Tipografi
   =========================== */

h1, h2, h3, h4, h5, h6 {
    color: var(--dark);
    margin-bottom: 15px;
}

h1 { font-size: 36px; }
h2 { font-size: 28px; }
h3 { font-size: 24px; }
h4 { font-size: 20px; }
h5 { font-size: 18px; }
h6 { font-size: 16px; }

p {
    margin-bottom: 15px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: var(--primary-dark);
}

/* ===========================
   Footer
   =========================== */

footer {
    background: var(--dark);
    color: var(--white);
    padding: 30px 0;
    margin-top: 50px;
    text-align: center;
}

footer p {
    margin: 0;
}

/* ===========================
   Responsive
   =========================== */

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 15px;
    }

    header nav {
        gap: 15px;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .card {
        padding: 20px;
    }

    .field-group {
        flex-direction: column;
    }

    .field-group .btn-icon {
        width: 100%;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 10px;
    }

    h1 { font-size: 28px; }
    h2 { font-size: 22px; }
    h3 { font-size: 18px; }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
    }

    .container {
        padding: 0 10px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }

    .card {
        padding: 15px;
    }

    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 16px; }
}

/* ===========================
   Yardımcı Sınıflar
   =========================== */

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.text-muted {
    color: var(--gray);
}

.text-danger {
    color: var(--danger);
}

.text-success {
    color: var(--secondary);
}

.text-primary {
    color: var(--primary);
}

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.cursor-pointer {
    cursor: pointer;
}

.opacity-50 {
    opacity: 0.5;
}

.opacity-75 {
    opacity: 0.75;
}

.main-field-group {
    align-items: center;
}

.dynamic-fields-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
}

.dynamic-field {
    display: grid;
    grid-template-columns: 150px 1fr 1fr auto;
    gap: 10px;
    align-items: center;
    padding: 12px;
    border: 1px dashed rgba(52, 152, 219, 0.35);
    border-radius: 10px;
    background: rgba(52, 152, 219, 0.04);
}

.qr-sidebar .card-body {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.download-panel.hidden {
    display: none;
}

.download-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 12px;
}

.compact-group {
    margin-bottom: 0;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.download-grid .btn {
    width: 100%;
}

.alert {
    padding: 14px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 600;
}

.alert-success {
    background: rgba(46, 204, 113, 0.12);
    color: #1e8449;
    border: 1px solid rgba(46, 204, 113, 0.25);
}

.alert-danger {
    background: rgba(231, 76, 60, 0.10);
    color: #b03a2e;
    border: 1px solid rgba(231, 76, 60, 0.25);
}

@media (max-width: 900px) {
    .dynamic-field {
        grid-template-columns: 1fr;
    }

    .download-grid {
        grid-template-columns: 1fr;
    }
}