/* ==========================================================================
   TechBiz Security — academy.css (Phase 7)
   ========================================================================== */

.ac-header {
    position: sticky; top: 0; z-index: 100;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.ac-header__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 1rem; }
.ac-nav { display: flex; align-items: center; gap: clamp(0.6rem, 2vw, 1.4rem); flex-wrap: wrap; }
.ac-nav a { color: var(--text-secondary); font-size: 0.92rem; font-weight: 500; }
.ac-nav a:hover { color: var(--text); }
.ac-nav__user { color: var(--accent); font-size: 0.9rem; }
.ac-main { min-height: 70vh; }

.ac-footer { background: var(--bg-secondary); border-top: 1px solid var(--border); margin-top: 4rem; }
.ac-footer__inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; padding-block: 1.5rem; }
.ac-footer p { font-size: 0.85rem; }
.ac-footer nav { display: flex; gap: 1.2rem; }
.ac-footer nav a { font-size: 0.85rem; color: var(--text-secondary); }

/* Auth cards */
.ac-auth { display: grid; place-items: center; padding: 3rem 1rem; }
.ac-auth__card { width: 100%; max-width: 440px; }
.ac-auth__card h1 { font-size: 1.5rem; text-align: center; margin-bottom: 0.3rem; }
.ac-auth__sub { text-align: center; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 1.5rem; }
.ac-auth__alt { text-align: center; margin-top: 1.2rem; font-size: 0.88rem; }

/* Course cards */
.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
@media (max-width: 900px) { .course-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .course-grid { grid-template-columns: 1fr; } }
.course-card { display: flex; flex-direction: column; overflow: hidden; padding: 0; }
.course-card__thumb { position: relative; overflow: hidden; height: 150px; background: linear-gradient(135deg, rgba(0,255,136,0.2), rgba(0,200,255,0.2)); display: grid; place-items: center; color: var(--accent); font-size: 2.2rem; }
.course-card__body { padding: var(--space-3); display: flex; flex-direction: column; flex: 1; }
.course-card__meta { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 0.6rem; }
.course-card__title { font-size: 1.1rem; margin-bottom: 0.4rem; }
.course-card__desc { font-size: 0.88rem; flex: 1; }
.course-card__foot { display: flex; justify-content: space-between; align-items: center; margin-top: var(--space-2); }
.course-card__price { font-family: var(--font-head); color: var(--accent); font-weight: 700; }

/* Progress bar */
.progress { height: 8px; background: var(--bg); border-radius: 999px; overflow: hidden; margin: 0.5rem 0; }
.progress__bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 999px; transition: width .4s; }
.progress-label { font-size: 0.78rem; color: var(--text-secondary); }

/* Dashboard */
.ac-dash-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 2rem; }
@media (max-width: 800px) { .ac-dash-grid { grid-template-columns: repeat(2, 1fr); } }
.ac-stat { text-align: center; }
.ac-stat__num { font-family: var(--font-head); font-size: 2rem; font-weight: 700; color: var(--accent); }
.ac-stat__label { font-size: 0.82rem; color: var(--text-secondary); }

/* Course detail / lesson viewer */
.course-layout { display: grid; grid-template-columns: 1fr 340px; gap: var(--space-4); align-items: start; }
@media (max-width: 900px) { .course-layout { grid-template-columns: 1fr; } }
.lesson-list { display: grid; gap: 0.4rem; }
.lesson-list a, .lesson-list span { display: flex; align-items: center; gap: 0.7rem; padding: 0.7rem 0.85rem; border-radius: var(--radius-sm); border: 1px solid var(--border); font-size: 0.9rem; color: var(--text-secondary); }
.lesson-list a:hover { border-color: var(--border-strong); color: var(--text); }
.lesson-list a.is-current { border-color: var(--accent); color: var(--accent); }
.lesson-list .is-done i { color: var(--accent); }
.lesson-list .is-locked { opacity: 0.55; }

.video-wrap { position: relative; padding-top: 56.25%; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: #000; }
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.lesson-body { font-size: 1.02rem; line-height: 1.8; margin-top: var(--space-3); }
.lesson-body h2 { font-size: 1.4rem; margin: var(--space-3) 0 var(--space-2); }
.lesson-body p { color: var(--text); margin-bottom: var(--space-2); }
.lesson-nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: var(--space-4); flex-wrap: wrap; }