/* ===== RESET & VARIABLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1f2937;
    --gray: #6b7280;
    --light-gray: #f3f4f6;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--dark);
}

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

/* ===== HEADER ===== */
.main-header {
    text-align: center;
    color: var(--white);
    margin-bottom: 40px;
}

.main-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===== FRIENDS GRID ===== */
.friends-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.friend-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.friend-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.friend-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    margin: 0 auto 20px;
}

.friend-name {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.friend-stats {
    display: flex;
    justify-content: space-around;
    margin-bottom: 15px;
}

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

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--gray);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--dark);
}

.stat-value.success {
    color: var(--success);
}

.stat-value.danger {
    color: var(--danger);
}

.win-loss-bar {
    height: 8px;
    background: var(--danger);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.win-portion {
    height: 100%;
    background: var(--success);
    transition: width 0.3s ease;
}

.btn-delete-friend {
    width: 100%;
    padding: 8px;
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

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

/* ===== ADD FRIEND BUTTON ===== */
.btn-add-friend {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--success);
    color: var(--white);
    border: none;
    padding: 18px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-add-friend:hover {
    background: #059669;
    transform: scale(1.05);
}

.plus-icon {
    font-size: 1.5rem;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--white);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    padding: 30px;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.modal-header h2 {
    color: var(--dark);
}

.close-btn {
    font-size: 2rem;
    color: var(--gray);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: var(--danger);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 20px;
    flex: 1;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark);
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

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

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-submit:hover {
    background: #2563eb;
}

/* ===== DASHBOARD ===== */
.dashboard-header {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.btn-back {
    background: var(--light-gray);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    margin-bottom: 20px;
    transition: background 0.3s ease;
}

.btn-back:hover {
    background: #e5e7eb;
}

.header-info h1 {
    color: var(--dark);
    margin-bottom: 20px;
}

.overall-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.stat-box {
    background: var(--light-gray);
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.stat-box .stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 8px;
}

.stat-box .stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: bold;
}

/* ===== CHARTS ===== */
.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.chart-card {
    background: var(--white);
    border-radius: 16px;
    padding: 25px;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    margin-bottom: 20px;
    color: var(--dark);
}

.chart-card canvas {
    height: 300px !important;
}

/* ===== FORM CARD ===== */
.form-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.form-card h3 {
    margin-bottom: 25px;
    color: var(--dark);
}

/* ===== TRADES TABLE ===== */
.trades-table-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.trades-table-card h3 {
    margin-bottom: 20px;
    color: var(--dark);
}

.table-responsive {
    overflow-x: auto;
}

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

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

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--light-gray);
}

th {
    font-weight: 600;
    color: var(--dark);
}

td {
    color: var(--gray);
}

.badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: bold;
}

.badge-success {
    background: #d1fae5;
    color: var(--success);
}

.badge-danger {
    background: #fee2e2;
    color: var(--danger);
}

.btn-delete {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

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

.success {
    color: var(--success);
    font-weight: bold;
}

.danger {
    color: var(--danger);
    font-weight: bold;
}

.empty-state,
.empty-table {
    text-align: center;
    padding: 40px;
    color: var(--gray);
    font-size: 1.1rem;
}

/* ===== NOTIFICATION ===== */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--white);
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    z-index: 2000;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-success {
    border-left: 4px solid var(--success);
}

.notification-danger {
    border-left: 4px solid var(--danger);
}

.notification-info {
    border-left: 4px solid var(--primary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .main-header h1 {
        font-size: 2rem;
    }

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

    .charts-container {
        grid-template-columns: 1fr;
    }

    .form-row {
        flex-direction: column;
    }

    .overall-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .btn-add-friend {
        bottom: 20px;
        right: 20px;
        padding: 15px 25px;
    }

    table {
        font-size: 0.85rem;
    }

    th, td {
        padding: 8px;
    }
}