/* ===== RESET & BASE ===== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #0a0a0f;
    color: #fff;
    min-height: 100vh;
}

.sponsor-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 32px 60px;
}

/* ===== HEADER ===== */
.sponsor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 100, 0, 0.15);
    margin-bottom: 40px;
}

.header-left {
    flex: 1;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #000000;
    background-color: #e67e22;
    text-decoration: none;
    font-size: 14px;
    font-weight: bolder;
    padding: 8px 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.back-btn:hover {
    border-color: #e67e22;
    color: #e67e22;
    background: rgba(230, 126, 34, 0.05);
}

.header-center {
    text-align: center;
    flex: 2;
}

.header-center h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #f0c27f, #fc5c7d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.header-center p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    margin: 4px 0 0;
    -webkit-text-fill-color: rgba(255, 255, 255, 0.5);
}

.header-right {
    flex: 1;
}

/* ===== SECTIONS ===== */
h3 {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 6px;
}

.tier-sub {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
    margin-bottom: 20px;
}

/* ===== TIER CARDS ===== */
.tier-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.tier-card {
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.tier-card:hover {
    border-color: rgba(230, 126, 34, 0.3);
    transform: translateY(-3px);
}

.tier-card.selected {
    border-color: #e67e22;
    background: rgba(230, 126, 34, 0.08);
    box-shadow: 0 0 30px rgba(230, 126, 34, 0.05);
}

.tier-card .tier-icon {
    font-size: 32px;
    display: block;
    margin-bottom: 8px;
}

.tier-card .tier-name {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.tier-card .tier-price {
    font-size: 20px;
    font-weight: 700;
    color: #f0c27f;
    margin-bottom: 6px;
}

.tier-card .tier-price small {
    font-size: 12px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.4);
}

.tier-card .tier-desc {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.5;
}

.tier-card .tier-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: #c0392b;
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    padding: 3px 12px;
    border-radius: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tier-card .check-mark {
    display: none;
    position: absolute;
    top: 8px;
    right: 12px;
    font-size: 18px;
    color: #e67e22;
}

.tier-card.selected .check-mark {
    display: block;
}

/* ===== FORM ===== */
.sponsor-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px 30px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 28px 32px;
    margin-bottom: 40px;
}

.sponsor-form .full-width {
    grid-column: 1 / -1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
}

.form-group label .required {
    color: #e67e22;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    color: #fff;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #e67e22;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.2);
}

/* ===== ENGAGEMENT ===== */
.engagement-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 40px;
}

.eng-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.eng-item:hover {
    border-color: rgba(230, 126, 34, 0.2);
    background: rgba(255, 255, 255, 0.05);
}

.eng-item.selected {
    border-color: #e67e22;
    background: rgba(230, 126, 34, 0.08);
    color: #fff;
}

.eng-item input[type="checkbox"] {
    display: none;
}

.eng-item .eng-icon {
    font-size: 16px;
}

/* ===== AGREEMENT ===== */
.agreement-section {
    margin-bottom: 30px;
}

.agreement-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 8px;
    padding: 16px 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    transition: border-color 0.3s;
}

.agreement-box:hover {
    border-color: rgba(230, 126, 34, 0.2);
}

.agreement-box input[type="checkbox"] {
    margin-top: 2px;
    accent-color: #e67e22;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    cursor: pointer;
}

.agreement-box label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    cursor: pointer;
}

.agreement-box label strong {
    color: #f0c27f;
}

/* ===== ACTIONS ===== */
.sponsor-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.btn-secondary {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #aaa;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: #e67e22;
    color: #e67e22;
    background: rgba(230, 126, 34, 0.05);
}

.btn-primary {
    background: linear-gradient(90deg, #e67e22, #c0392b);
    color: #fff;
    border: none;
    padding: 12px 36px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn-primary:hover {
    transform: scale(1.02);
    opacity: 0.9;
}

/* ===== FOOTER ===== */
.sponsor-footer {
    text-align: center;
    padding: 24px 0 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.2);
    margin-top: 30px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .tier-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 820px) {
    .sponsor-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    .header-left,
    .header-right {
        flex: none;
        width: 100%;
    }
    .back-btn {
        display: inline-block;
    }
    .sponsor-form {
        grid-template-columns: 1fr;
        padding: 20px;
    }
    .sponsor-form .full-width {
        grid-column: 1;
    }
    .engagement-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .sponsor-page {
        padding: 16px;
    }
    .tier-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .tier-card {
        padding: 16px 12px;
    }
    .tier-card .tier-price {
        font-size: 16px;
    }
    .engagement-grid {
        grid-template-columns: 1fr;
    }
    .sponsor-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .btn-secondary,
    .btn-primary {
        text-align: center;
        padding: 12px;
    }
}