/* ===================================
   ELO / UKD Hesaplama Sayfasi Stilleri
   =================================== */

/* --- TAB SWITCH --- */
.calc-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 25px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--color-dark);
}

.calc-tab {
    flex: 1;
    padding: 14px 20px;
    background: rgba(30, 41, 59, 0.08);
    border: none;
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.calc-tab:not(:last-child) {
    border-right: 2px solid var(--color-dark);
}

.calc-tab:hover {
    background: rgba(30, 41, 59, 0.15);
}

.calc-tab.active {
    background: var(--color-dark);
    color: white;
}

.calc-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
}

/* --- TAB ICERIGI --- */
.calc-panel {
    display: none;
    animation: fadeInCalc 0.3s ease;
}

.calc-panel.active {
    display: block;
}

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

/* --- HESAPLAMA HEADER --- */
.calc-header {
    text-align: center;
    margin-bottom: 30px;
}

.calc-header h1 {
    font-size: 1.8rem;
    color: var(--color-dark);
    margin: 0 0 8px;
}

.calc-header p {
    color: var(--color-text-muted);
    margin: 0;
    font-size: 0.95rem;
}

/* --- CHESS-RESULTS IMPORT BOLUMU --- */
.cr-import-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 2px dashed #0ea5e9;
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 25px;
    transition: var(--transition);
}

.cr-import-section:hover {
    border-color: #0284c7;
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
}

.cr-import-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-weight: 600;
    color: #0369a1;
    font-size: 0.95rem;
}

.cr-import-header span {
    font-size: 1.3rem;
}

.cr-import-row {
    display: flex;
    gap: 10px;
    align-items: stretch;
}

.cr-import-row input {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid #bae6fd;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.9rem;
    transition: var(--transition);
    background: white;
}

.cr-import-row input:focus {
    outline: none;
    border-color: #0ea5e9;
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.15);
}

.cr-import-row input::placeholder {
    color: #94a3b8;
}

.cr-player-select {
    min-width: 180px;
    padding: 10px 14px;
    border: 2px solid #bae6fd;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.9rem;
    background: white;
    cursor: pointer;
    transition: var(--transition);
}

.cr-player-select:focus {
    outline: none;
    border-color: #0ea5e9;
}

.btn-import {
    padding: 10px 20px;
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-import:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn-import:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.cr-status {
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    min-height: 20px;
}

.cr-status.error {
    color: #dc2626;
}

.cr-status.success {
    color: #16a34a;
}

/* --- FORM ALANLARI --- */
.calc-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: flex;
    gap: 15px;
    align-items: flex-end;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-dark);
}

.form-group input,
.form-group select {
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.95rem;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group input::placeholder {
    color: #94a3b8;
}

/* --- K-FAKTOR BUTONLARI --- */
.k-factor-group {
    display: flex;
    gap: 8px;
}

.k-btn {
    padding: 10px 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-dark);
}

.k-btn:hover {
    border-color: var(--color-dark);
    background: rgba(30, 41, 59, 0.05);
}

.k-btn.active {
    background: var(--color-dark);
    color: white;
    border-color: var(--color-dark);
}

.k-btn-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.k-btn.active .k-btn-label {
    color: rgba(255,255,255,0.7);
}

/* --- RAKIPLER BOLUMU --- */
.opponents-section {
    margin-top: 5px;
}

.opponents-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.opponents-header h3 {
    margin: 0;
    font-size: 1rem;
    color: var(--color-dark);
}

.opponents-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* --- RAKIP SATIRI --- */
.opponent-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    background: var(--color-bg-light);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    animation: slideInRow 0.3s ease;
    transition: var(--transition);
}

.opponent-row:hover {
    border-color: var(--color-dark-lighter);
}

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

.opponent-num {
    width: 28px;
    height: 28px;
    background: var(--color-dark);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.opponent-row input {
    width: 100px;
    padding: 8px 10px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 0.9rem;
    text-align: center;
    transition: var(--transition);
    background: white;
}

.opponent-row input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.opponent-name {
    flex: 1;
    min-width: 0;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* --- SONUC BUTONLARI (Galibiyet/Beraberlik/Maglubiyet) --- */
.result-btns {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.result-btn {
    width: 36px;
    height: 36px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    font-family: var(--font-family);
    font-weight: 700;
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-btn:hover {
    border-color: var(--color-dark-lighter);
}

.result-btn.win {
    color: #16a34a;
    border-color: #16a34a;
}

.result-btn.win.active {
    background: #16a34a;
    color: white;
}

.result-btn.draw {
    color: #d97706;
    border-color: #d97706;
}

.result-btn.draw.active {
    background: #d97706;
    color: white;
}

.result-btn.loss {
    color: #dc2626;
    border-color: #dc2626;
}

.result-btn.loss.active {
    background: #dc2626;
    color: white;
}

/* --- RAKIP SILME BUTONU --- */
.btn-remove-opponent {
    width: 28px;
    height: 28px;
    border: none;
    background: none;
    color: var(--color-text-light);
    font-size: 1.2rem;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0;
}

.btn-remove-opponent:hover {
    background: rgba(220, 38, 38, 0.1);
    color: var(--color-primary);
}

/* --- RAKIP EKLEME BUTONU --- */
.btn-add-opponent {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-sm);
    background: transparent;
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 5px;
}

.btn-add-opponent:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(220, 38, 38, 0.03);
}

/* --- HESAPLA BUTONU --- */
.btn-calculate {
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    margin-top: 10px;
    letter-spacing: 0.5px;
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(220, 38, 38, 0.35);
}

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

/* --- SONUC ALANI --- */
.calc-result {
    display: none;
    margin-top: 25px;
    animation: fadeInCalc 0.4s ease;
}

.calc-result.visible {
    display: block;
}

.result-summary {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.result-card {
    flex: 1;
    padding: 20px;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--color-border);
}

.result-card.old-rating {
    background: var(--color-bg-light);
}

.result-card.change {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-color: #bae6fd;
}

.result-card.new-rating {
    background: linear-gradient(135deg, var(--color-dark) 0%, #0f172a 100%);
    color: white;
    border-color: transparent;
}

.result-card-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    opacity: 0.7;
}

.result-card-value {
    font-size: 1.8rem;
    font-weight: 700;
}

.result-card.change .result-card-value.positive {
    color: #16a34a;
}

.result-card.change .result-card-value.negative {
    color: #dc2626;
}

.result-card.change .result-card-value.zero {
    color: #d97706;
}

/* --- DETAYLI SONUC TABLOSU --- */
.result-details {
    overflow-x: auto;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.result-table thead tr {
    background: var(--color-dark);
    color: white;
}

.result-table th {
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.result-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
}

.result-table tbody tr:nth-child(even) {
    background: var(--color-bg-light);
}

.result-table tbody tr:hover {
    background: rgba(14, 165, 233, 0.05);
}

.result-table .score-win {
    color: #16a34a;
    font-weight: 700;
}

.result-table .score-draw {
    color: #d97706;
    font-weight: 700;
}

.result-table .score-loss {
    color: #dc2626;
    font-weight: 700;
}

.result-table .change-positive {
    color: #16a34a;
    font-weight: 700;
}

.result-table .change-negative {
    color: #dc2626;
    font-weight: 700;
}

/* --- FORMUL INFO --- */
.formula-info {
    margin-top: 25px;
    padding: 20px;
    background: var(--color-bg-light);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.formula-info summary {
    font-weight: 600;
    color: var(--color-dark);
    cursor: pointer;
    font-size: 0.95rem;
}

.formula-info summary:hover {
    color: var(--color-primary);
}

.formula-info-content {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--color-text);
    line-height: 1.7;
}

.formula-box {
    background: var(--color-dark);
    color: #e2e8f0;
    padding: 15px 20px;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    margin: 12px 0;
    text-align: center;
    font-weight: 600;
}

/* --- K-FAKTOR INFO TABLOSU (UKD icin) --- */
.k-info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 0.85rem;
}

.k-info-table th,
.k-info-table td {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    text-align: left;
}

.k-info-table thead tr {
    background: var(--color-dark);
    color: white;
}

.k-info-table tbody tr:nth-child(even) {
    background: var(--color-bg-light);
}

/* --- MOBIL RESPONSIVE --- */
@media screen and (max-width: 768px) {
    .calc-header h1 {
        font-size: 1.4rem;
    }

    .form-row {
        flex-direction: column;
        gap: 10px;
    }

    .k-factor-group {
        flex-wrap: wrap;
    }

    .opponent-row {
        flex-wrap: wrap;
        gap: 8px;
        padding: 10px 12px;
    }

    .opponent-row input {
        width: 80px;
    }

    .result-summary {
        flex-direction: column;
        gap: 10px;
    }

    .result-card-value {
        font-size: 1.4rem;
    }

    .cr-import-row {
        flex-direction: column;
    }

    .cr-player-select {
        min-width: auto;
    }

    .result-table {
        font-size: 0.8rem;
    }

    .result-table th,
    .result-table td {
        padding: 8px 6px;
    }

    .calc-tabs {
        flex-direction: column;
    }

    .calc-tab:not(:last-child) {
        border-right: none;
        border-bottom: 2px solid var(--color-dark);
    }
}