/* ============================================================================
   AIMLSE — auth (sign in / register / terms)
   Shares the editorial system used by the landing page: near-black surfaces,
   Cormorant Garamond display, DM Sans body, DM Mono for labels and data.
   Gold is a single accent — primary action, links, one hairline, focus ring.
   Nothing else is gold.
   ========================================================================== */

*{margin:0;padding:0;box-sizing:border-box;}

:root{
  --bg:#0b0b0c;--surface:#141416;--surface2:#101012;--surface3:#191919;
  --border:#232326;--border-b:#2e2e32;
  --text:#e8e6e1;--text-dim:#8e8b84;--text-mute:#6a6862;--text-bright:#f5f2ea;

  /* One accent. The metallic gradient is gone. */
  --gold:#c9a84c;--gold2:#c9a84c;--gold-light:#e6cf87;--gold-dark:#8a6d1f;
  --gold-grad:#c9a84c;

  --red:#b4544a;--green:#5c9e6b;

  --serif:'Cormorant Garamond',Georgia,serif;
  --font-ui:'DM Sans',system-ui,-apple-system,sans-serif;
  --font:'DM Mono',ui-monospace,monospace;
  --brad:4px;
}

body{
  font-family:var(--font-ui);
  background:var(--bg);color:var(--text);
  min-height:100vh;overflow-x:hidden;display:flex;flex-direction:column;
  -webkit-font-smoothing:antialiased;
}

/* Ambient wash, matching the landing page. */
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(800px 460px at 50% -10%,rgba(201,168,76,.07),transparent 70%);
}
.top-nav,.page-wrapper{position:relative;z-index:1;}

/* ── NAV ── */
.top-nav{
  height:56px;background:rgba(11,11,12,.8);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;padding:0 24px;justify-content:space-between;
  flex-shrink:0;
}
.nav-logo{display:flex;align-items:center;flex-shrink:0;}
.nav-logo-img{height:34px;width:34px;object-fit:contain;display:block;flex-shrink:0;border-radius:5px;}
.nav-right{margin-left:auto;}
.nav-link{
  font-family:var(--font);font-size:10px;color:var(--text-dim);text-decoration:none;
  letter-spacing:.12em;text-transform:uppercase;
  padding:6px 12px;border:1px solid var(--border-b);border-radius:2px;
  background:transparent;transition:color .18s,border-color .18s;
}
.nav-link:hover{color:var(--text);border-color:var(--text-mute);}

/* ── PAGE ── */
.page-wrapper{flex:1;display:flex;align-items:center;justify-content:center;padding:48px 20px;}
.auth-container{width:100%;max-width:420px;}

/* ── HEADER ── */
.auth-header{text-align:center;margin-bottom:28px;}
.auth-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:100px;
  background:transparent;border:1px solid var(--border-b);
  font-family:var(--font);font-size:9.5px;font-weight:400;letter-spacing:.18em;
  text-transform:uppercase;color:var(--text-dim);margin-bottom:16px;
}
.auth-header h1{
  font-family:var(--serif);font-size:38px;font-weight:300;
  color:var(--text-bright);letter-spacing:-.01em;line-height:1.1;margin-bottom:8px;
}
.auth-header p{font-size:13px;font-weight:300;color:var(--text-dim);}

/* ── CARD ── */
.auth-card{
  background:var(--surface);border:1px solid var(--border);border-radius:6px;
  padding:30px 28px;
  box-shadow:0 24px 70px rgba(0,0,0,.5);
  position:relative;overflow:hidden;
}
/* The single gold hairline — the one deliberate accent on the card. */
.auth-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold) 50%,transparent);
  opacity:.6;
}

/* ── FORM MESSAGES ── */
.form-message{
  padding:10px 13px;border-radius:var(--brad);font-size:12px;font-weight:400;
  margin-bottom:16px;display:none;
}
.form-message.error{background:rgba(180,84,74,.08);border:1px solid rgba(180,84,74,.3);color:#e08b83;display:block;}
.form-message.success{background:rgba(92,158,107,.08);border:1px solid rgba(92,158,107,.3);color:#8fce9d;display:block;}

/* ── FORM ── */
.form-group{margin-bottom:16px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;}

label{
  display:block;font-family:var(--font);font-size:9.5px;font-weight:400;
  text-transform:uppercase;letter-spacing:.16em;color:var(--text-mute);margin-bottom:7px;
}
input,select{
  width:100%;padding:11px 13px;
  background:var(--surface2);border:1px solid var(--border-b);border-radius:var(--brad);
  font-family:var(--font-ui);font-size:13px;font-weight:300;color:var(--text);
  outline:none;transition:border-color .18s,box-shadow .18s;
  -webkit-appearance:none;appearance:none;
}
input:focus,select:focus{border-color:var(--gold);box-shadow:0 0 0 3px rgba(201,168,76,.10);}
input::placeholder{color:var(--text-mute);font-weight:300;}
select{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236a6862' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 13px center;padding-right:36px;cursor:pointer;
}
select option{background:var(--surface2);}

.field-error{font-size:11px;color:#e08b83;margin-top:5px;display:none;font-weight:300;}
.field-error.visible{display:block;}

.pw-wrap{position:relative;}
.pw-wrap input{padding-right:42px;}
.pw-toggle{
  position:absolute;right:11px;top:50%;transform:translateY(-50%);
  background:none;border:none;cursor:pointer;color:var(--text-mute);padding:4px;
  line-height:1;transition:color .18s;
}
.pw-toggle:hover{color:var(--text);}

.forgot-link{
  display:block;text-align:right;font-size:12px;
  color:var(--text-dim);text-decoration:none;font-weight:300;
  margin-top:-6px;margin-bottom:18px;transition:color .18s;
}
.forgot-link:hover{color:var(--gold);}

/* ── BUTTONS ── */
.btn-submit{
  width:100%;padding:13px;margin-top:4px;
  background:var(--gold);border:none;border-radius:var(--brad);
  color:#0b0b0c;font-family:var(--font-ui);font-size:13px;font-weight:500;
  letter-spacing:.02em;cursor:pointer;transition:background .18s,transform .1s;
}
.btn-submit:hover{background:var(--gold-light);}
.btn-submit:active{transform:scale(.995);}
.btn-submit:disabled{opacity:.45;pointer-events:none;}
.btn-submit.loading{pointer-events:none;opacity:.6;}

.btn-demo{
  width:100%;padding:11px;margin-top:0;
  background:transparent;border:1px solid var(--border-b);border-radius:var(--brad);
  color:var(--text-dim);font-family:var(--font-ui);font-size:12.5px;font-weight:400;
  cursor:pointer;transition:color .18s,border-color .18s;
}
.btn-demo:hover{color:var(--text);border-color:var(--text-mute);}
.btn-demo:disabled{opacity:.45;pointer-events:none;}

/* ── DIVIDER ── */
.divider{display:flex;align-items:center;gap:14px;margin:20px 0;}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--border);}
.divider span{font-family:var(--font);font-size:9px;color:var(--text-mute);letter-spacing:.16em;text-transform:uppercase;}

/* ── OAUTH ── */
.oauth-grid{display:flex;flex-direction:column;gap:10px;}
.oauth-btn{
  width:100%;padding:11px 16px;background:var(--surface2);
  border:1px solid var(--border-b);border-radius:var(--brad);
  font-family:var(--font-ui);font-size:12.5px;font-weight:400;color:var(--text);
  cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;
  text-decoration:none;transition:border-color .18s,background .18s;
}
.oauth-btn:hover{border-color:var(--text-mute);background:var(--surface3);}
.oauth-icon{width:20px;height:20px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}

/* ── REGISTER LINK ── */
.register-link{text-align:center;margin-top:20px;font-size:12.5px;font-weight:300;color:var(--text-dim);}
.register-link a{color:var(--gold);text-decoration:none;}
.register-link a:hover{text-decoration:underline;}

/* ── PASSWORD STRENGTH ── */
.pw-strength{margin-top:8px;display:none;}
.pw-strength.visible{display:block;}
.pw-strength-bar{height:2px;border-radius:2px;background:var(--surface3);overflow:hidden;margin-bottom:5px;}
.pw-strength-fill{height:100%;border-radius:2px;transition:width .3s,background .3s;width:0;}
.pw-strength-label{font-family:var(--font);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;}

/* ── FORM PANELS (tabs) ── */
.form-panel{display:none;}
.form-panel.active{display:block;animation:fadein .22s ease forwards;}
@keyframes fadein{from{opacity:0;transform:translateY(5px);}to{opacity:1;transform:translateY(0);}}

/* ── BACK LINK ── */
.back-link{
  display:block;text-align:center;margin-top:22px;font-size:12px;font-weight:300;
  color:var(--text-mute);text-decoration:none;transition:color .18s;
}
.back-link:hover{color:var(--text-dim);}
.back-link span{color:var(--gold);}

/* ── TERMS ── */
.terms-note{text-align:center;font-size:11px;color:var(--text-mute);margin-top:18px;line-height:1.6;font-weight:300;}
.terms-note a{color:var(--gold);text-decoration:none;}
.terms-note a:hover{text-decoration:underline;}

/* ── TERMS ACCEPTANCE ── */
.terms-accept{
  display:flex;align-items:flex-start;gap:10px;
  margin:2px 0 16px;padding:12px 13px;
  background:var(--surface2);border:1px solid var(--border);border-radius:var(--brad);
  transition:border-color .18s,box-shadow .18s;
}
.terms-accept.error{border-color:rgba(180,84,74,.5);box-shadow:0 0 0 3px rgba(180,84,74,.08);}
.terms-accept input[type=checkbox]{
  width:15px;height:15px;flex-shrink:0;margin-top:1px;cursor:pointer;
  -webkit-appearance:none;appearance:none;
  background:transparent;border:1px solid var(--border-b);border-radius:2px;
  position:relative;transition:background .18s,border-color .18s;
}
.terms-accept input[type=checkbox]:hover{border-color:var(--text-mute);}
.terms-accept input[type=checkbox]:checked{background:var(--gold);border-color:var(--gold);}
.terms-accept input[type=checkbox]:checked::after{
  content:'';position:absolute;left:4px;top:1px;width:4px;height:8px;
  border:solid #0b0b0c;border-width:0 2px 2px 0;transform:rotate(45deg);
}
.terms-accept input[type=checkbox]:focus-visible{outline:2px solid var(--gold);outline-offset:2px;}
.terms-accept label{
  font-family:var(--font-ui);font-size:12px;font-weight:300;line-height:1.55;
  color:var(--text-dim);text-transform:none;letter-spacing:0;margin:0;cursor:pointer;
}
.terms-accept label a{color:var(--gold);text-decoration:none;}
.terms-accept label a:hover{text-decoration:underline;}

/* ── AUTH TABS ── */
.auth-tabs{
  display:flex;gap:2px;
  background:var(--surface2);border:1px solid var(--border);border-radius:var(--brad);
  padding:3px;margin-bottom:22px;
}
.auth-tab{
  flex:1;padding:9px;border:none;border-radius:2px;
  background:transparent;font-family:var(--font-ui);font-size:12px;font-weight:400;
  color:var(--text-dim);cursor:pointer;transition:all .2s;
}
.auth-tab.active{background:var(--surface3);color:var(--text-bright);}

/* ── FOCUS ── */
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--gold);outline-offset:2px;
}

@media(max-width:480px){
  .auth-card{padding:24px 20px;}
  .top-nav{padding:0 16px;}
  .auth-header h1{font-size:32px;}
}