/* =========================================================================
   آی‌زنگ — صفحه اصلی
   ایده: «دفتر کلاس» — فهرست حضورغیاب روی گوشی و یک روز مدرسه به ترتیب ساعت.
   تنها حرکت خودکار: آمدن پیامک غیبت و یک بار زنگ خوردن نقطه کهربایی در معرفی.
========================================================================= */

.iz-home { display: block; }
.iz-wrap { max-width: var(--iz-wrap); margin: 0 auto; padding: 0 16px; }
.iz-wrap--narrow { max-width: 780px; }
.iz-h2 { font-size: clamp(1.6rem, 3.2vw, 2.15rem); font-weight: 800; line-height: 1.35; letter-spacing: -.01em; margin: 0 0 10px; color: var(--iz-ink); }
.iz-sub { font-size: 1.05rem; line-height: 1.9; color: var(--iz-muted); margin: 0 0 36px; max-width: 62ch; }

/* ===== معرفی ===== */
.iz-hero { background: var(--iz-white); border-bottom: 1px solid var(--iz-line); overflow: hidden; }
.iz-hero__inner { max-width: var(--iz-wrap); margin: 0 auto; padding: 64px 16px 72px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.iz-hero__title { font-size: clamp(2.2rem, 5.4vw, 3.6rem); font-weight: 800; line-height: 1.22; letter-spacing: -.02em; margin: 0 0 18px; color: var(--iz-ink); }
.iz-hero__lead { font-size: 1.15rem; line-height: 1.95; color: var(--iz-muted); margin: 0 0 28px; max-width: 46ch; }
.iz-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.iz-hero__origin { margin: 26px 0 0; padding-inline-start: 14px; border-inline-start: 3px solid var(--iz-amber); font-size: .95rem; line-height: 1.85; color: var(--iz-muted); max-width: 44ch; }

.iz-hero__visual { position: relative; display: flex; justify-content: center; padding: 10px 0 40px; }
.iz-phone {
    width: 300px; background: var(--iz-white); border: 10px solid var(--iz-ink); border-radius: 36px;
    box-shadow: 0 30px 60px -20px rgba(14,90,107,.35); overflow: hidden; font-size: 13px;
}
.iz-phone__bar { display: flex; justify-content: space-between; padding: 12px 16px; background: var(--iz-teal); color: #fff; font-weight: 700; }
.iz-phone__class { padding: 12px 16px; border-bottom: 1px solid var(--iz-line); display: grid; gap: 2px; }
.iz-phone__class strong { font-size: 14px; }
.iz-phone__class span { color: var(--iz-muted); font-size: 12px; }
.iz-roll { list-style: none; margin: 0; padding: 6px 10px; display: grid; gap: 6px; }
.iz-roll li { display: flex; align-items: center; gap: 8px; padding: 8px 8px; border: 1px solid #e6ebee; border-radius: 10px; }
.iz-roll li.is-marked { border-color: #e7b3ad; background: #fdf3f2; }
.iz-roll__n { color: #8b97a2; width: 14px; text-align: center; }
.iz-roll__name { flex: 1; font-weight: 700; }
.iz-roll__m { font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 999px; border: 1px solid currentColor; }
.iz-roll__m.is-present { color: #047857; }
.iz-roll__m.is-absent { color: #fff; background: #b91c1c; border-color: #b91c1c; }
.iz-roll__m.is-late { color: #92400e; }
.iz-roll__g { font-weight: 800; color: var(--iz-teal); min-width: 30px; text-align: center; background: var(--iz-teal-soft); border-radius: 8px; padding: 2px 4px; }
.iz-phone__save { margin: 8px 12px 14px; background: var(--iz-teal); color: #fff; text-align: center; font-weight: 700; padding: 11px; border-radius: 12px; }

.iz-sms {
    position: absolute; inset-inline-end: calc(50% + 70px); bottom: 0; width: 250px;
    background: var(--iz-white); border: 1px solid var(--iz-line); border-radius: 16px 16px 4px 16px;
    padding: 14px 16px 14px 16px; box-shadow: 0 18px 40px -16px rgba(22,32,42,.35);
    animation: iz-sms-in .6s cubic-bezier(.2,.8,.2,1) .9s both;
}
.iz-sms__dot { position: absolute; top: -7px; inset-inline-start: -7px; width: 16px; height: 16px; border-radius: 50%; background: var(--iz-amber); border: 3px solid var(--iz-white); animation: iz-ring 1.2s ease-out 1.5s 1 both; }
.iz-sms__from { display: block; font-size: 12px; color: var(--iz-muted); margin-bottom: 4px; }
.iz-sms p { margin: 0; font-size: 13.5px; line-height: 1.85; }
@keyframes iz-sms-in { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes iz-ring { 0% { box-shadow: 0 0 0 0 rgba(242,182,54,.7); } 100% { box-shadow: 0 0 0 16px rgba(242,182,54,0); } }
@media (prefers-reduced-motion: reduce) { .iz-sms, .iz-sms__dot { animation: none; } }

@media (max-width: 900px) {
    .iz-hero__inner { grid-template-columns: 1fr; padding: 40px 16px 48px; gap: 36px; }
    .iz-sms { inset-inline-end: auto; inset-inline-start: 50%; transform-origin: center; margin-inline-start: -10px; }
}
@media (max-width: 520px) {
    .iz-phone { width: 270px; }
    .iz-sms { position: relative; inset: auto; width: 100%; max-width: 300px; margin: -24px auto 0; }
    .iz-hero__visual { flex-direction: column; align-items: center; padding-bottom: 0; }
    .iz-hero__actions .iz-btn { flex: 1 1 100%; }
}

/* ===== یک روز مدرسه ===== */
.iz-day { padding: 80px 0; }
.iz-timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.iz-timeline::before { content: ''; position: absolute; top: 8px; bottom: 8px; inset-inline-start: 104px; width: 2px; background: var(--iz-line); }
.iz-timeline li { position: relative; display: grid; grid-template-columns: 96px 1fr; gap: 40px; padding: 0 0 34px; }
.iz-timeline li:last-child { padding-bottom: 0; }
.iz-timeline li::after { content: ''; position: absolute; top: 9px; inset-inline-start: 99px; width: 12px; height: 12px; border-radius: 50%; background: var(--iz-white); border: 3px solid var(--iz-teal); }
.iz-timeline time { font-size: 1.35rem; font-weight: 800; color: var(--iz-teal); text-align: end; line-height: 1.6; }
.iz-timeline h3 { margin: 0 0 6px; font-size: 1.15rem; font-weight: 800; line-height: 1.6; }
.iz-timeline p { margin: 0; line-height: 1.95; color: var(--iz-muted); max-width: 64ch; }
@media (max-width: 640px) {
    .iz-day { padding: 56px 0; }
    .iz-timeline::before { inset-inline-start: 5px; }
    .iz-timeline li { grid-template-columns: 1fr; gap: 2px; padding-inline-start: 28px; }
    .iz-timeline li::after { inset-inline-start: 0; }
    .iz-timeline time { text-align: start; font-size: 1.1rem; }
}

/* ===== نقش‌ها ===== */
.iz-roles { padding: 80px 0; background: var(--iz-white); border-block: 1px solid var(--iz-line); }
.iz-roles .iz-h2 { margin-bottom: 36px; }
.iz-roles__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.iz-role { padding: 0 28px; border-inline-start: 1px solid var(--iz-line); }
.iz-role:first-child { padding-inline-start: 0; border-inline-start: 0; }
.iz-role h3 { margin: 0 0 14px; font-size: 1.25rem; font-weight: 800; color: var(--iz-teal); }
.iz-role ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.iz-role li { position: relative; padding-inline-start: 22px; line-height: 1.85; }
.iz-role li::before { content: ''; position: absolute; inset-inline-start: 2px; top: .7em; width: 9px; height: 9px; border-radius: 50%; background: var(--iz-amber); }
@media (max-width: 860px) {
    .iz-roles { padding: 56px 0; }
    .iz-roles__grid { grid-template-columns: 1fr; gap: 30px; }
    .iz-role, .iz-role:first-child { padding: 0; border: 0; }
}

/* ===== امنیت ===== */
.iz-trust { padding: 80px 0; background: var(--iz-teal-dark); color: #fff; }
.iz-trust .iz-h2 { color: #fff; }
.iz-trust .iz-sub { color: #CFE3E7; margin-bottom: 0; }
.iz-trust__inner { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.iz-trust__list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 26px 32px; }
.iz-trust__list li { display: grid; gap: 4px; padding-top: 14px; border-top: 2px solid rgba(255,255,255,.18); }
.iz-trust__list strong { font-size: 1.05rem; }
.iz-trust__list span { color: #CFE3E7; line-height: 1.8; font-size: .95rem; }
@media (max-width: 860px) {
    .iz-trust { padding: 56px 0; }
    .iz-trust__inner { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 520px) { .iz-trust__list { grid-template-columns: 1fr; } }

/* ===== پلن‌ها ===== */
.iz-plans { padding: 80px 0; }
.iz-plans__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; align-items: stretch; }
.iz-plan { position: relative; display: flex; flex-direction: column; gap: 14px; background: var(--iz-white); border: 1px solid var(--iz-line); border-radius: 18px; padding: 26px 22px; }
.iz-plan.is-featured { border: 2px solid var(--iz-teal); box-shadow: 0 20px 40px -24px rgba(14,90,107,.5); }
.iz-plan__flag { position: absolute; top: -13px; inset-inline-start: 20px; background: var(--iz-amber); color: var(--iz-ink); font-size: 12.5px; font-weight: 800; padding: 4px 12px; border-radius: 999px; }
.iz-plan h3 { margin: 0; font-size: 1.25rem; font-weight: 800; }
.iz-plan h3 a { color: var(--iz-ink); text-decoration: none; }
.iz-plan__price { font-size: 1.4rem; font-weight: 800; color: var(--iz-teal); }
.iz-plan__price del { color: #8b97a2; font-size: 1rem; font-weight: 500; margin-inline-end: 6px; }
.iz-plan__price ins { text-decoration: none; }
.iz-plan ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; flex: 1; }
.iz-plan li { position: relative; padding-inline-start: 26px; line-height: 1.8; }
.iz-plan li::before { content: ''; position: absolute; inset-inline-start: 2px; top: .45em; width: 14px; height: 8px; border-inline-start: 2.5px solid var(--iz-teal); border-bottom: 2.5px solid var(--iz-teal); transform: rotate(-45deg) scaleX(-1); }
.iz-plan .iz-btn { width: 100%; }
.iz-plans__empty { background: var(--iz-white); border: 1px dashed #b7c3cb; border-radius: 18px; padding: 28px; display: flex; gap: 20px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.iz-plans__empty p { margin: 0; line-height: 1.9; max-width: 60ch; }
.iz-plans__note { margin: 18px 0 0; font-size: .92rem; color: var(--iz-muted); }
@media (max-width: 640px) { .iz-plans { padding: 56px 0; } }

/* ===== شروع ===== */
.iz-start { padding: 72px 0; background: var(--iz-white); border-block: 1px solid var(--iz-line); }
.iz-start .iz-h2 { margin-bottom: 32px; }
.iz-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: iz-step; }
.iz-steps li { counter-increment: iz-step; position: relative; padding-top: 58px; }
.iz-steps li::before { content: counter(iz-step); position: absolute; top: 0; inset-inline-start: 0; width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; background: var(--iz-teal); color: #fff; font-weight: 800; font-size: 1.1rem; }
.iz-steps h3 { margin: 0 0 6px; font-size: 1.1rem; font-weight: 800; }
.iz-steps p { margin: 0; line-height: 1.9; color: var(--iz-muted); }
@media (max-width: 760px) { .iz-steps { grid-template-columns: 1fr; gap: 24px; } .iz-start { padding: 56px 0; } }

/* ===== سؤال‌ها ===== */
.iz-faq { padding: 80px 0; }
.iz-faq .iz-h2 { margin-bottom: 24px; }
.iz-faq details { border-bottom: 1px solid var(--iz-line); }
.iz-faq summary { list-style: none; cursor: pointer; padding: 18px 0; font-weight: 700; font-size: 1.05rem; display: flex; justify-content: space-between; gap: 16px; }
.iz-faq summary::-webkit-details-marker { display: none; }
.iz-faq summary::after { content: '+'; font-size: 1.4rem; line-height: 1; color: var(--iz-teal); flex: none; }
.iz-faq details[open] summary::after { content: '−'; }
.iz-faq details p { margin: 0 0 18px; line-height: 1.95; color: var(--iz-muted); }
@media (max-width: 640px) { .iz-faq { padding: 56px 0; } }

/* ===== درخواست نمایش ===== */
.iz-demo { padding: 80px 0 96px; background: var(--iz-white); border-top: 1px solid var(--iz-line); }
.iz-demo__inner { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.iz-demo__intro p { line-height: 1.95; color: var(--iz-muted); margin: 0 0 22px; }
.iz-demo__contact { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; margin: 0; }
.iz-demo__contact dt { color: var(--iz-muted); }
.iz-demo__contact dd { margin: 0; font-weight: 700; }
.iz-demo__contact a { color: var(--iz-teal); text-decoration: none; }
.iz-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; background: var(--iz-paper); border: 1px solid var(--iz-line); border-radius: 18px; padding: 26px; }
.iz-form__row { grid-column: 1 / -1; display: grid; gap: 6px; }
.iz-form__row--half { grid-column: span 1; }
.iz-form label { font-weight: 700; font-size: 14px; }
.iz-form input, .iz-form select, .iz-form textarea { width: 100%; font: inherit; font-size: 15px; padding: 12px 14px; border: 1px solid #c3ced6; border-radius: 10px; background: #fff; color: var(--iz-ink); }
.iz-form input:focus, .iz-form select:focus, .iz-form textarea:focus { border-color: var(--iz-teal); outline: 3px solid rgba(14,90,107,.18); outline-offset: 0; }
.iz-form .iz-btn { grid-column: 1 / -1; justify-self: start; }
.iz-form__hp { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.iz-form__status { grid-column: 1 / -1; margin: 0; padding: 12px 14px; border-radius: 10px; line-height: 1.8; font-weight: 700; }
.iz-form__status.is-ok { background: #e7f6ee; color: #05603a; border: 1px solid #a6e3c3; }
.iz-form__status.is-error { background: #fdecec; color: #9b1c1c; border: 1px solid #f3b4b4; }
.iz-form__privacy { grid-column: 1 / -1; margin: 0; font-size: 13px; color: var(--iz-muted); }
@media (max-width: 860px) { .iz-demo__inner { grid-template-columns: 1fr; gap: 28px; } .iz-demo { padding: 56px 0 64px; } }
@media (max-width: 520px) { .iz-form { grid-template-columns: 1fr; padding: 18px; } .iz-form__row--half { grid-column: 1 / -1; } .iz-form .iz-btn { width: 100%; } }