/* New Version 4: Plan Purchase Modal
   Isolated stylesheet for the "buy a plan" flow — device ownership check,
   serial number entry, login redirect, confirmation. Loaded after styles.css
   so it can read the shared design tokens (--primary, --radius-*, etc). */

.plan-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(20,22,88,0.45);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    transition: opacity 0.25s ease;
}
.plan-modal-overlay.open { display: flex; }
.plan-modal-overlay.visible { opacity: 1; }
.plan-modal {
    position: relative;
    background: #fff;
    width: 100%;
    max-width: 520px;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: 0 40px 80px rgba(0,0,0,0.25);
    transform: translateY(16px) scale(0.98);
    opacity: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
}
.plan-modal-overlay.visible .plan-modal { transform: translateY(0) scale(1); opacity: 1; }
.plan-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--surface-low);
    color: var(--on-surface-variant);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
}
.plan-modal-close:hover { background: var(--outline-variant); color: var(--primary); }
.plan-modal-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: none;
    color: var(--on-surface-variant);
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 20px;
    transition: color 0.2s;
}
.plan-modal-back:hover { color: var(--primary); }
.plan-modal-back .material-symbols-outlined { font-size: 18px; }

.plan-modal-eyebrow {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--on-surface-variant);
    opacity: 0.7;
    margin-bottom: 8px;
}
.plan-modal-summary {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--surface-low);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
}
.plan-modal-summary-name { font-weight: 900; color: var(--primary); font-size: 17px; }
.plan-modal-summary-price { font-weight: 700; color: var(--secondary); font-size: 15px; }

.plan-modal-title { font-size: 26px; font-weight: 900; color: var(--primary); line-height: 1.25; margin-bottom: 12px; }
.plan-modal-sub { font-size: 16px; color: var(--on-surface-variant); line-height: 1.6; margin-bottom: 28px; }

.plan-options { display: flex; flex-direction: column; gap: 12px; }
.plan-option {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
    padding: 18px;
    background: #fff;
    border: 1px solid rgba(199,197,209,0.4);
    border-radius: var(--radius-sm);
    text-align: left;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.1s;
}
.plan-option:hover { border-color: var(--secondary); box-shadow: 0 4px 16px rgba(0,99,152,0.12); }
.plan-option:active { transform: scale(0.99); }
.plan-option-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: rgba(0,99,152,0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}
.plan-option-icon .material-symbols-outlined { font-size: 24px; color: var(--secondary); }
.plan-option-text { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.plan-option-title { font-weight: 800; font-size: 16px; color: var(--primary); }
.plan-option-sub { font-size: 14px; color: var(--on-surface-variant); }
.plan-option-arrow { font-size: 20px; color: var(--outline-variant); flex-shrink: 0; transition: transform 0.2s, color 0.2s; }
.plan-option:hover .plan-option-arrow { color: var(--secondary); transform: translateX(2px); }

.serial-form { display: flex; flex-direction: column; }
.serial-label { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--on-surface-variant); margin-bottom: 8px; }
.serial-input {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(199,197,209,0.5);
    font-family: inherit;
    font-size: 16px;
    color: var(--on-surface);
    background: var(--surface-low);
    outline: none;
    transition: border-color 0.2s, background 0.2s;
}
.serial-input:focus { border-color: var(--secondary); background: #fff; }
.serial-error { color: #ba1a1a; font-size: 14px; font-weight: 600; margin-top: 8px; }
.serial-submit { margin-top: 20px; width: 100%; }

.plan-modal-step--confirm { text-align: center; }
.plan-modal-success-icon { margin: 0 auto 20px; width: 72px; height: 72px; border-radius: var(--radius-full); background: rgba(0,99,152,0.1); display: flex; align-items: center; justify-content: center; }
.plan-modal-success-icon .material-symbols-outlined { font-size: 40px; color: var(--secondary); }
.plan-modal-step--confirm .btn-primary { width: 100%; justify-content: center; }

/* ── Mobile ── */
@media (max-width: 768px) {
    .plan-modal { padding: 32px 24px; border-radius: var(--radius-md); max-height: calc(100vh - 32px); }
    .plan-modal-title { font-size: 22px; }
    .plan-option { padding: 14px; gap: 12px; }
    .plan-option-icon { width: 40px; height: 40px; }
}